IP Library › Granted Patent US 12,242,293
Granted Patent B2
US 12,242,293 · App. 18/322,181 · Granted Mar 4, 2025

Low-noise high efficiency bias generation circuits and method

Inventors: Tae Youn Kim (Irvine, CA); Robert Mark Englekirk (Littleton, CO)
Assignee: pSemi Corporation
G05F1/56G05F1/468H03F1/303
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Quick Facts
Patent No.
US 12,242,293
App. No.
18/322,181
Granted
Mar 4, 2025
Kind
B2
Abstract

An apparatus for generating a steady state positive voltage (PVS) signal and a steady state negative voltage (NVS) signal is presented. The apparatus includes a bias signal generation module for generating a steady state reference voltage signal (RVS) based on a varying supply voltage signal (VDD), the RVS having a voltage level less than the PVS. The apparatus further includes a positive signal generation module (PSGM) generating the PVS, the PSGM including a first capacitor, the PSGM employing the first capacitor to generate a portion of the PVS based on the RVS. The apparatus further includes a negative signal generation module (NSGM) generating the NVS, the NSGM including a second capacitor, the NSGM employing the second capacitor to generate a portion of the NVS based on the RVS.

Claims (72)

1. A system comprising:

a bias signal generator configured to generate a reference voltage signal based at least in part on a supply voltage signal;

a first charge pump configured to generate a positive voltage signal and maintain a voltage level of the positive voltage signal during a switching event, wherein the first charge pump comprises a first charge pump capacitor, wherein the first charge pump is configured to employ the first charge pump capacitor to generate a portion of the positive voltage signal based at least in part on the reference voltage signal, wherein the reference voltage signal has a voltage level that is less than the voltage level of the positive voltage signal; and

at least one radio frequency (RF) switch configured to receive the positive voltage signal and perform the switching event.

2. The system of claim 1 , further comprising a second charge pump configured to generate a negative voltage signal and maintain a voltage level of the negative voltage signal during the switching event, wherein the second charge pump comprises a second charge pump capacitor, wherein the second charge pump is configured to employ the second charge pump capacitor to generate a portion of the negative voltage signal based at least in part on the reference voltage signal, and wherein the at least one RF switch is configured to receive the negative voltage signal.

3. The system of claim 2 , wherein the negative voltage signal is a negative rail voltage signal having a voltage level maintained by the second charge pump during the switching event.

4. The system of claim 3 , wherein the at least one RF switch is configured to:

receive the negative rail voltage signal at a first port of the at least one RF switch;

receive an input signal at a second port of the at least one RF switch; and

provide, based on the switching event, an output signal at a third port of the at least one RF switch.

5. The system of claim 1 , wherein the positive voltage signal is a positive rail voltage signal having a voltage level maintained by the first charge pump during the switching event.

6. The system of claim 5 , wherein the at least one RF switch is configured to:

receive the positive rail voltage signal at a first port of the at least one RF switch;

receive an input signal at a second port of the at least one RF switch;

perform the switching event based on the positive rail voltage signal; and

provide, based on the switching event, an output signal at a third port of the at least one RF switch.

7. The system of claim 1 , wherein the bias signal generator comprises a bandgap reference generator configured to generate at least a portion of the reference voltage signal based on the supply voltage signal.

8. The system of claim 1 , wherein the at least one RF switch is configured to:

receive the positive voltage signal at a first port of the at least one RF switch;

receive an input signal at a second port of the at least one RF switch;

perform the switching event based on the positive voltage signal; and

provide, based on the switching event, an output signal at a third port of the at least one RF switch.

9. The system of claim 1 , wherein the at least one RF switch is configured to be driven based on the positive voltage signal.

10. The system of claim 1 , wherein the first charge pump comprises a low dropout (LDO) regulator configured to provide a charge pump control signal based at least in part on the reference voltage signal, and wherein the first charge pump is configured to employ the first charge pump capacitor to generate the portion of the positive voltage signal based at least in part on the charge pump control signal.

11. The system of claim 1 , wherein the first charge pump further comprises a second charge pump capacitor, wherein the first charge pump is configured to employ the second charge pump capacitor to generate another portion of the positive voltage signal based at least in part on the reference voltage signal.

12. The system of claim 1 , further comprising an oscillator configured to generate a first clock signal, wherein the first charge pump is configured to generate the positive voltage signal further based at least in part on the first clock signal.

13. The system of claim 12 , wherein the oscillator is further configured to generate a second clock signal, wherein the first charge pump is configured to generate the positive voltage signal further based at least in part on the second clock signal, and wherein the first clock signal and the second clock signal form a differential pair of clock signals.

14. The system of claim 1 , wherein the first charge pump further comprises a voltage clamp configured to maintain the voltage level of the positive voltage signal during the switching event.

15. A method comprising:

generating a reference voltage signal based at least in part on a supply voltage signal;

generating, by a first charge pump, a positive voltage signal, wherein the generating the positive voltage signal comprises employing a first charge pump capacitor of the first charge pump to generate a portion of the positive voltage signal based at least in part on the reference voltage signal, wherein the reference voltage signal has a voltage level that is less than a voltage level of the positive voltage signal;

maintaining, by the first charge pump, the voltage level of the positive voltage signal during a switching event;

receiving, by at least one radio frequency (RF) switch, the positive voltage signal; and

performing, by the at least one RF switch, the switching event.

16. The method of claim 15 , wherein the positive voltage signal is received at a first port of the at least one RF switch, wherein the switching event is performed based on the positive voltage signal, the method further comprising:

receiving an input signal at a second port of the at least one RF switch; and

providing, based on the switching event, an output signal at a third port of the at least one RF switch.

17. The method of claim 15 , further comprising:

generating, by a second charge pump, a negative voltage signal, wherein the generating the negative voltage signal comprises employing a charge pump capacitor of the second charge pump to generate a portion of the negative voltage signal based at least in part on the reference voltage signal; and

maintaining, by the second charge pump, a voltage level of the negative voltage signal during the switching event.

18. The method of claim 17 , wherein the positive voltage signal is a positive rail voltage signal having a voltage level maintained by the first charge pump during the switching event, and wherein the negative voltage signal is a negative rail voltage signal having a voltage level maintained by the second charge pump during the switching event.

19. The method of claim 18 , wherein the positive rail voltage signal is received at a first port of the at least one RF switch, wherein the switching event is performed based on the positive rail voltage signal, the method further comprising:

receiving an input signal at a second port of the at least one RF switch; and

providing, based on the switching event, an output signal at a third port of the at least one RF switch.

20. The method of claim 15 , further comprising driving, based on the positive voltage signal, the at least one RF switch.

21. The method of claim 15 , further comprising providing, by a low dropout (LDO) regulator, a charge pump control signal based at least in part on the reference voltage signal, wherein the generating the positive voltage signal comprises employing the first charge pump capacitor of the first charge pump to generate the portion of the positive voltage signal based at least in part on the charge pump control signal.

22. The method of claim 15 , further comprising generating a differential pair of clock signals, wherein the generating the positive voltage signal further comprises employing a second charge pump capacitor of the first charge pump to generate another portion of the positive voltage signal based at least in part on the reference voltage signal and the differential pair of clock signals.

23. A system comprising:

means for generating a reference voltage signal based on a supply voltage signal;

means for generating a positive voltage signal comprising means for employing a first charge pump capacitor to generate a portion of the positive voltage signal based at least in part on the reference voltage signal, wherein the reference voltage signal has a voltage level that is less than a voltage level of the positive voltage signal;

means for maintaining the voltage level of the positive voltage signal during a switching event;

means for receiving the positive voltage signal; and

means for performing the switching event.

24. The system of claim 23 , further comprising:

means for receiving an input signal; and

means for providing an output signal based on the switching event.

25. The system of claim 23 , further comprising:

means for generating a negative voltage signal comprising means for employing a second charge pump capacitor to generate a portion of the negative voltage signal based on the reference voltage signal; and

means for maintaining a voltage level of the negative voltage signal during the switching event.

26. The system of claim 25 , wherein the positive voltage signal is a positive rail voltage signal having a voltage level maintained during the switching event, wherein the negative voltage signal is a negative rail voltage signal having a voltage level maintained during the switching event, wherein the means for receiving the positive voltage signal comprises means for receiving the positive rail voltage signal, the system further comprising:

means for receiving the negative rail voltage signal;

means for receiving an input signal; and

means for providing an output signal based on the switching event.

27. The system of claim 23 , further comprising:

means for generating one or more clock signals;

means for generating a negative voltage signal comprising means for employing a second charge pump capacitor to generate a portion of the negative voltage signal based on the reference voltage signal and the one or more clock signals;

means for maintaining a voltage level of the negative voltage signal during the switching event;

means for providing a charge pump control signal based on the reference voltage signal,

wherein:

the means for employing the first charge pump capacitor comprises means for employing the first charge pump capacitor to generate the portion of the positive voltage signal based on the charge pump control signal and the one or more clock signals; and

the means for generating the positive voltage signal further comprises means for employing a third charge pump capacitor to generate another portion of the positive voltage signal based on the charge pump control signal and the one or more clock signals.

28. The system of claim 23 , wherein the positive voltage signal is a positive rail voltage signal, and wherein the system further comprises means for driving, based on the positive rail voltage signal, a radio frequency (RF) switch.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 16, 2024
From: KIM, TAE YOUN; ENGLEKIRK, ROBERT MARK
To: PEREGRINE SEMICONDUCTOR CORPORATION
Reel/Frame 068309/0430 →
CHANGE OF NAME Recorded Aug 16, 2024
From: PEREGRINE SEMICONDUCTOR CORPORATION
To: PSEMI CORPORATION
Reel/Frame 068674/0835 →
Continuity (10)
Continuation 17530290 · Nov 18, 2021
Continuation 16744027 · Jan 15, 2020
Continuation 16143142 · Sep 26, 2018
Continuation 15688597 · Aug 28, 2017
Continuation 15059206 · Mar 2, 2016
Continuation 14462193 · Aug 18, 2014
Continuation 13016875 · Jan 28, 2011
Provisional Application 61372086 · Aug 9, 2010
Provisional Application 61371652 · Aug 6, 2010
Related Publication 20230384811A1 · Nov 30, 2023
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