Power converter implementations, programmable gain, and programmable compensation
A power supply includes a voltage converter to produce an output voltage to power a load. The power supply further includes a reference voltage generator and a controller. The reference voltage generator is operative to generate a floor reference voltage that varies as a function of the output voltage depending on a setting of one or more adjustable (programmable) resistor-capacitor paths in the floor reference voltage generator. The controller produces control signals to control the voltage converter as a function of the floor reference voltage and the output voltage.
1. A power supply comprising:
a voltage converter to produce an output voltage to power a load;
a floor reference voltage generator operative to generate a floor reference voltage that varies as a function of the output voltage and a setting of an adjustable resistor-capacitor path in the floor reference voltage generator;
a controller to produce control output to control the voltage converter as a function of the floor reference voltage and the output voltage; and
wherein the adjustable resistor-capacitor path provides a setting of a zero associated with the floor reference voltage generator.
2. The power supply as in claim 1 further comprising:
a ramp voltage generator operative to produce a ramp voltage, the ramp voltage being offset by the floor reference voltage; and
wherein the controller is operative to produce the control output based on a comparison of the output voltage to the offset ramp voltage.
3. The power supply as in claim 1 , wherein the floor reference voltage generator includes a floor reference voltage amplifier operative to produce the floor reference voltage; and
wherein the adjustable resistor-capacitor path is disposed in a feedback path of the floor reference voltage amplifier.
4. The power supply as in claim 3 , wherein the adjustable resistor-capacitor path is operative to control a gain response associated with generating the floor reference voltage.
5. The power supply as in claim 3 , wherein the adjustable resistor-capacitor path is operative to control a phase and gain associated with the floor reference voltage amplifier.
6. The power supply as in claim 1 , wherein the adjustable resistor-capacitor path controls a phase response associated with the floor reference voltage generator.
7. A system comprising:
a circuit substrate; and
the power supply of claim 1 , the power supply fabricated on the circuit substrate.
8. A method comprising:
receiving a circuit substrate; and
fabricating the power supply of claim 1 on the circuit substrate.
9. A power supply comprising:
a voltage converter to produce an output voltage to power a load;
a floor reference voltage generator operative to generate a floor reference voltage that varies as a function of the output voltage and a setting of an adjustable resistor-capacitor path in the floor reference voltage generator;
a controller to produce control output to control the voltage converter as a function of the floor reference voltage and the output voltage;
wherein the floor reference voltage generator includes a floor reference voltage amplifier operative to produce the floor reference voltage;
wherein the adjustable resistor-capacitor path is disposed in a feedback path of the floor reference voltage amplifier; and
wherein the adjustable resistor-capacitor path is operative to control an AC (Alternating Current) gain of the floor reference voltage amplifier.
10. The power supply as in claim 9 , wherein the adjustable resistor-capacitor path provides a setting of a zero associated with the floor reference voltage generator.
11. A power supply comprising:
a voltage converter to produce an output voltage to power a load;
a floor reference voltage generator operative to generate a floor reference voltage that varies as a function of the output voltage and a setting of an adjustable resistor-capacitor path in the floor reference voltage generator;
a controller to produce control output to control the voltage converter as a function of the floor reference voltage and the output voltage;
wherein the floor reference voltage generator includes a floor reference voltage amplifier operative to produce the floor reference voltage;
wherein the adjustable resistor-capacitor path is disposed in a circuit path between an output of a sense amplifier stage and an input of the floor reference voltage amplifier; and
wherein the sense amplifier stage is operative to input an error voltage signal into the circuit path to the floor reference voltage amplifier.
12. A power supply comprising:
a voltage converter to produce an output voltage to power a load;
a floor reference voltage generator operative to generate a floor reference voltage that varies as a function of the output voltage and a setting of an adjustable resistor-capacitor path in the floor reference voltage generator;
a controller to produce control output to control the voltage converter as a function of the floor reference voltage and the output voltage; and
wherein the adjustable resistor-capacitor path includes a capacitor ladder, the power supply further comprising:
a controller operative to control a capacitance of the capacitor ladder to a desired capacitance setting.
13. A power supply comprising:
a voltage converter to produce an output voltage to power a load;
a floor reference voltage generator operative to generate a floor reference voltage that varies as a function of the output voltage and a setting of an adjustable resistor-capacitor path in the floor reference voltage generator;
a controller to produce control output to control the voltage converter as a function of the floor reference voltage and the output voltage; and
wherein the adjustable resistor-capacitor path includes a resistor ladder, the power supply further comprising:
a controller operative to control a resistance of the resistor ladder to a desired resistance setting.
14. A power supply comprising:
a voltage converter to produce an output voltage to power a load;
a floor reference voltage generator operative to generate a floor reference voltage that varies as a function of the output voltage and a setting of an adjustable resistor-capacitor path in the floor reference voltage generator;
a controller to produce control output to control the voltage converter as a function of the floor reference voltage and the output voltage; and
wherein a magnitude of the floor reference voltage varies depending on an error signal derived from comparing the output voltage to a reference voltage.
15. A power supply comprising:
a voltage converter to produce an output voltage to power a load;
a floor reference voltage generator operative to generate a floor reference voltage that varies as a function of the output voltage and a setting of an adjustable resistor-capacitor path in the floor reference voltage generator;
a controller to produce control output to control the voltage converter as a function of the floor reference voltage and the output voltage; and
wherein the adjustable resistor-capacitor path receives a ripple voltage and provides zero compensation to a floor reference voltage amplifier in the floor reference voltage generator.
16. A power supply comprising:
a voltage converter to produce an output voltage to power a load;
a floor reference voltage generator operative to generate a floor reference voltage that varies as a function of the output voltage and a setting of an adjustable resistor-capacitor path in the floor reference voltage generator;
a controller to produce control output to control the voltage converter as a function of the floor reference voltage and the output voltage;
wherein the floor reference voltage generator includes a floor reference voltage amplifier operative to produce the floor reference voltage; and
wherein the adjustable resistor-capacitor path is a first adjustable resistor-capacitor path disposed in a feedback path of the floor reference voltage amplifier, the first adjustable resistor-capacitor path being operative to control an AC (Alternating Current) gain of the floor reference voltage amplifier, the power supply further comprising:
a second adjustable resistor-capacitor path providing a setting of a zero associated with the floor reference voltage generator.
17. A method comprising:
producing an output voltage to power a load;
via a floor reference voltage generator, generating a floor reference voltage that varies as a function of the output voltage and a setting of an adjustable resistor-capacitor path;
producing control output to control the voltage converter as a function of the floor reference voltage and the output voltage; and
wherein the setting of the adjustable resistor-capacitor path controls an AC (Alternating Current) gain of a floor reference voltage amplifier of the floor reference voltage generator.
18. The method as in claim 17 further comprising:
producing a ramp voltage, the ramp voltage being offset by the floor reference voltage; and
wherein producing the control output includes producing the control output based on a comparison of the output voltage to the offset ramp voltage.
19. The method as in claim 17 further comprising:
receiving a control signal; and
via the control signal, controlling the setting of the adjustable resistor-capacitor path, the adjustable resistor-capacitor path disposed in a feedback path of the floor reference voltage amplifier.
20. The method as in claim 17 further comprising:
inputting an error voltage signal into the adjustable resistor-capacitor path of the floor reference voltage generator.
21. The method as in claim 17 , wherein the adjustable resistor-capacitor path provides a setting of a zero associated with the floor reference voltage generator.
22. The method as in claim 17 , wherein the setting of the adjustable resistor-capacitor path controls a phase response associated with the floor reference voltage generator.
23. The method as in claim 17 , wherein the adjustable resistor-capacitor path includes a capacitor ladder, the method further comprising:
selecting the setting of the adjustable resistor-capacitor path via control of the capacitor ladder to a desired capacitance.
24. The method as in claim 17 , wherein the adjustable resistor-capacitor path includes a resistor ladder, the method further comprising:
selecting the setting of the adjustable resistor-capacitor path via control of the resistor ladder to a desired resistance.
25. The method as in claim 17 , wherein a magnitude of the floor reference voltage varies depending on an error signal derived from comparing the output voltage to a reference voltage.
26. The method as in claim 17 further comprising:
receiving a ripple voltage as input to the adjustable resistor-capacitor path, the adjustable resistor-capacitor path providing zero compensation to the floor reference voltage amplifier in the floor reference voltage generator.
27. The method as in claim 17 , wherein the adjustable resistor-capacitor path is a first adjustable resistor-capacitor path disposed in a feedback path of the floor reference voltage amplifier of the floor reference voltage generator, the method further comprising:
via a setting applied to the first adjustable resistor-capacitor path, controlling an AC (Alternating Current) gain of the floor reference voltage amplifier; and
via a second adjustable resistor-capacitor path in the floor reference voltage generator, controlling a setting of a zero associated with the floor reference voltage generator.
28. A power supply comprising:
a voltage converter to produce an output voltage to power a load;
a floor reference voltage generator operative to generate a floor reference voltage that varies as a function of the output voltage and a setting of an adjustable resistor-capacitor path in the floor reference voltage generator;
a controller to produce control output to control the voltage converter as a function of the floor reference voltage and the output voltage; and
wherein the setting of the adjustable resistor-capacitor path is automatically tuned by a digital state machine based on a selected switching frequency of operating the voltage converter.
29. A power supply comprising:
a voltage converter to produce an output voltage to power a load;
a floor reference voltage generator operative to generate a floor reference voltage that varies as a function of the output voltage and a setting of an adjustable resistor-capacitor path in the floor reference voltage generator;
a controller to produce control output to control the voltage converter as a function of the floor reference voltage and the output voltage; and
wherein the adjustable resistor-capacitor path provides zero compensation to a floor reference voltage amplifier in the floor reference voltage generator.
30. A power supply comprising:
a voltage converter to produce an output voltage to power a load;
a floor reference voltage generator operative to generate a floor reference voltage that varies as a function of the output voltage and a setting of an adjustable resistor-capacitor path in the floor reference voltage generator;
a controller to produce control output to control the voltage converter as a function of the floor reference voltage and the output voltage; and
wherein the adjustable resistor-capacitor path is disposed between a first amplifier and a second amplifier.
31. The power supply as in claim 30 , wherein a first node of the adjustable resistor-capacitor path is coupled to an output of the first amplifier; and
wherein a second node of the adjustable resistor-capacitor path is coupled to an inverting input node of the second amplifier.
32. A power supply comprising:
a voltage converter to produce an output voltage to power a load;
a floor reference voltage generator operative to generate a floor reference voltage that varies as a function of the output voltage and a setting of an adjustable resistor-capacitor path in the floor reference voltage generator;
a controller to produce control output to control the voltage converter as a function of the floor reference voltage and the output voltage; and
wherein the adjustable resistor-capacitor path is disposed in parallel with a resistive element.
33. A power supply comprising:
a voltage converter to produce an output voltage to power a load;
a floor reference voltage generator operative to generate a floor reference voltage that varies as a function of the output voltage and a setting of an adjustable resistor-capacitor path in the floor reference voltage generator;
a controller to produce control output to control the voltage converter as a function of the floor reference voltage and the output voltage; and
wherein the adjustable resistor-capacitor path receives a ripple voltage.
34. A power supply comprising:
a voltage converter to produce an output voltage to power a load;
a floor reference voltage generator operative to generate a floor reference voltage that varies as a function of the output voltage and a setting of an adjustable resistor-capacitor path in the floor reference voltage generator;
a controller to produce control output to control the voltage converter as a function of the floor reference voltage and the output voltage; and
wherein the floor reference voltage generator is configured to include a first gain path for DC signal gain and a second gain path for AC signal gain, the adjustable resistor-capacitor path providing an AC gain associated with a received signal.
35. The power supply as in claim 34 , wherein the received signal is an error voltage signal.
36. The power supply as in claim 35 , wherein the error voltage signal is offset by a voltage value.