Ring voltage controlled oscillator-based phase locked loop with dual charge pump architecture
Embodiments included herein are directed towards a ring voltage-controlled oscillator based phase locked loop circuit. Embodiments may include an integral path including a plurality of resistors and a plurality of transistors configured to correct low frequency variations and a proportional path in electrical communication with the integral path, the proportional path including a plurality of transistors and a source degeneration circuit. Embodiments may further include a decoupling capacitor located at a ring voltage-controlled oscillator node in electrical communication with the proportional path, wherein the source degeneration circuit operates to cancel any effect from the ring voltage-controlled oscillator node.
1. A ring voltage-controlled oscillator based phase locked loop circuit comprising:
an integral path including a plurality of resistors and a plurality of transistors configured to correct low frequency variations;
a proportional path in electrical communication with the integral path, the proportional path including a plurality of transistors and a source degeneration circuit, wherein the source degeneration circuit includes a programmable resistor; and
a decoupling capacitor located at a ring voltage-controlled oscillator node in electrical communication with the proportional path, wherein the source degeneration circuit operates to cancel any effect from the ring voltage-controlled oscillator node.
2. The ring voltage-controlled oscillator based phase locked loop circuit of claim 1 , wherein the proportional path further includes a second source degeneration circuit.
3. The ring voltage-controlled oscillator based phase locked loop circuit of claim 1 , further comprising:
first charge pump circuitry associated with the integral path.
4. The ring voltage-controlled oscillator based phase locked loop circuit of claim 1 , further comprising:
second charge pump circuitry associated with the proportional path.
5. The ring voltage-controlled oscillator based phase locked loop circuit of claim 1 , wherein the source degeneration circuit includes a MOSFET.
6. The ring voltage-controlled oscillator based phase locked loop circuit claim 1 , wherein the source degeneration circuit includes a capacitor.
7. A ring voltage-controlled oscillator based phase locked loop method comprising:
providing an integral path including a plurality of resistors and a plurality of transistors configured to correct low frequency variations and a proportional path in electrical communication with the integral path, the proportional path including a plurality of transistors and a source degeneration circuit, wherein the source degeneration circuit includes a programmable resistor; and
electrically connecting a decoupling capacitor located at a ring voltage-controlled oscillator node with the proportional path, wherein the source degeneration circuit operates to cancel any effect from the ring voltage-controlled oscillator node.
8. The ring voltage-controlled oscillator based phase locked loop method of claim 7 , wherein the proportional path further includes a second source degeneration circuit.
9. The ring voltage-controlled oscillator based phase locked loop method of claim 7 , further comprising:
first charge pump circuitry associated with the integral path.
10. The ring voltage-controlled oscillator based phase locked loop method of claim 7 , further comprising:
second charge pump circuitry associated with the proportional path.
11. The ring voltage-controlled oscillator based phase locked loop method of claim 7 , wherein the source degeneration circuit includes a MOSFET.
12. The ring voltage-controlled oscillator based phase locked loop method of claim 7 , wherein the source degeneration circuit includes a capacitor.
13. A ring voltage-controlled oscillator based phase locked loop circuit comprising:
an integral path including a first resistor directly connected with a first transistor and a second resistor directly connected with a second transistor;
a proportional path in electrical communication with the integral path, the proportional path including a first source degeneration circuit directly connected with a first transistor and a second source degeneration circuit directly connected with a second transistor; and
a decoupling capacitor located at a ring voltage-controlled oscillator node in electrical communication with the proportional path, wherein the source degeneration circuit operates to cancel any effect from the ring voltage-controlled oscillator node.
14. The ring voltage-controlled oscillator based phase locked loop circuit of claim 13 , further comprising:
first charge pump circuitry associated with the integral path.
15. The ring voltage-controlled oscillator based phase locked loop circuit of claim 13 , further comprising:
second charge pump circuitry associated with the proportional path.
16. The ring voltage-controlled oscillator based phase locked loop circuit of claim 13 , wherein the source degeneration circuit includes a programmable resistor.
17. The ring voltage-controlled oscillator based phase locked loop circuit of claim 13 , wherein the source degeneration circuit includes a MOSFET.
18. The ring voltage-controlled oscillator based phase locked loop circuit of claim 13 , wherein the source degeneration circuit includes a capacitor.