Voltage controlled oscillator
View Patent ↗A folded starved inverter differential output apparatus for use in a voltage controlled oscillator includes a first polarity of two transistors that are cross-coupled and a second polarity of four transistors. Also included are two inverter gates and a supply regulator.
1. A folded starved inverter differential output apparatus for use in a voltage controlled oscillator comprising:
a first polarity of two transistors cross-coupled;
a second polarity of four transistors;
two inverter gates; and
a supply regulator.
2. A folded starved inverter differential output apparatus of claim 1 wherein the second polarity of four transistors are connected to perform input and control functions.
3. A folded starved inverter differential output apparatus of claim 2 wherein first polarity can be positive or negative.
4. A folded starved inverter differential output apparatus of claim 2 wherein the inverter gates provide linearity to a gain of the voltage controlled oscillator.
5. A folded starved inverter differential output apparatus of claim 2 wherein the supply regulator reduces power supply fluctuations.
6. A folded starved inverter differential output apparatus of claim 5 wherein the first polarity of cross-coupled transistors is connected to provide a differential generating output voltage.
7. A folded starved inverter differential output apparatus comprising
two transistors cross-coupled to provide an output stage;
four transistors connected to provide a folded starved inverter circuit;
two inverter gates; and
a supply regulator; wherein the folded starved inverter differential output apparatus provides a fast slew rate, large voltage swing and symmetric output waveform.
8. A folded starved inverter differential output apparatus of claim 7 wherein the cross-coupled transistors provide a differential output.
9. A folded starved inverter differential output apparatus of claim 7 wherein the inverter gates provide linearity to a gain of a voltage controlled oscillator.
10. A folded starved inverter differential output apparatus of claim 7 wherein the supply regulator reduces power supply fluctuations.
11. A folded starved inverter differential output apparatus of claim 7 wherein two of the four transistors provide an input connection.
12. A folded starved inverter differential output apparatus of claim 7 wherein two of the four transistors provide a current controlling function.
13. A receiver apparatus comprising:
a phase locked loop circuit including a voltage controlled oscillator used to generate a data sampling clock signal;
a data sampler to receive the data sampling clock signal; and
a folded starved inverter circuit contained within the voltage controlled oscillator.
14. A receiver apparatus of claim 13 wherein the folded starved inverter circuit provides a delay to an input signal.
15. A receiver apparatus of claim 14 wherein the folded starved inverter circuit contains two transistors cross-coupled to provide a differential output stage.
16. A receiver apparatus of claim 15 wherein the folded starved inverter circuit contains four transistors connected to provide a folded starved inverter circuit.
17. A receiver apparatus of claim 16 wherein two of the four transistors provide an input connection.
18. A receiver apparatus of claim 17 wherein two of the four transistors provide a current controlling function.
19. A receiver apparatus of claim 18 wherein the receiver further comprises a frequency comparator.
20. A receiver apparatus of claim 19 wherein the receiver samples received data at 3 times the frequency of the data signal.