Systems, methods, and devices for direct sampling in data converters
Systems, methods, and devices provide sampling for data converters. Methods include receiving a voltage from a voltage source, and identifying transconductance parameters and resistance parameters associated with a data converter, the transconductance parameters identifying a transconductance of the data converter. Methods also include selecting a resistor from a plurality of dynamically selectable resistors based on the resistance parameters, generating, using a programmable gain amplifier, a current based, at least in part, on the selected resistor and the received voltage, and providing the current to the data converter.
1. A method comprising:
receiving a voltage from a voltage source;
identifying transconductance parameters and resistance parameters associated with a data converter, the transconductance parameters identifying a transconductance of the data converter;
selecting a resistor from a plurality of dynamically selectable resistors based on the resistance parameters;
generating, using a programmable gain amplifier, a current based, at least in part, on the selected resistor and the received voltage; and
providing the current to the data converter.
2. The method of claim 1 , wherein the transconductance of the data converter is determined based, at least in part, on a transconductance of a configuration of a plurality of inverters included in the data converter.
3. The method of claim 2 , wherein the resistance parameters identify a resistance based on the transconductance of the data converter and an operational range of the voltage source.
4. The method of claim 3 , wherein an operational range comprises a peak-to-peak voltage of the voltage source.
5. The method of claim 1 , wherein the generating of the current further comprises:
coupling the selected resistor to an input of the programmable gain amplifier.
6. The method of claim 1 , wherein the voltage is received from a power supply.
7. The method of claim 6 , wherein the power supply is a battery.
8. The method of claim 1 further comprising:
calibrating a time constant of the data converter.
9. The method of claim 8 , wherein the calibrating further comprises:
selecting a capacitance for a variable capacitor included in the data converter.
10. A system comprising:
a voltage source;
a data converter comprising transconductance parameters identifying a transconductance of the data converter;
a plurality of dynamically selectable resistors configured to select a resistor based on the transconductance parameters and associated resistance parameters; and
a programmable gain amplifier configured to generate a current based, at least in part, on the selected resistor and a voltage received from the voltage source.
11. The system of claim 10 , wherein the transconductance of the data converter is determined based, at least in part, on a transconductance of a configuration of a plurality of inverters included in the data converter.
12. The system of claim 11 , wherein the resistance parameters identify a resistance based on the transconductance of the data converter and an operational range of the voltage source, and wherein an operational range comprises a peak-to-peak voltage of the voltage source.
13. The system of claim 10 , wherein the generating of the current further comprises:
coupling the selected resistor to an input of the programmable gain amplifier.
14. The system of claim 10 , wherein the voltage source is a battery.
15. The system of claim 10 , wherein the data converter is an analog to digital converter.
16. A device comprising:
a data converter comprising transconductance parameters identifying a transconductance of the data converter;
a plurality of dynamically selectable resistors configured to select a resistor based on the transconductance parameters and associated resistance parameters; and
a programmable gain amplifier configured to generate a current based, at least in part, on the selected resistor and a voltage received from a voltage source.
17. The device of claim 16 , wherein the transconductance of the data converter is determined based, at least in part, on a transconductance of a configuration of a plurality of inverters included in the data converter.
18. The device of claim 17 , wherein the resistance parameters identify a resistance based on the transconductance of the data converter and an operational range of the voltage source, and wherein an operational range comprises a peak-to-peak voltage of the voltage source.
19. The device of claim 16 , wherein the generating of the current further comprises:
coupling the selected resistor to an input of the programmable gain amplifier.
20. The device of claim 16 , wherein the data converter is an analog to digital converter.