US 11,888,445 B2
Variable capacitor devices with differential voltage control
Jean-Olivier Plouchart, New York, NY (US); Sudipto Chakraborty, Plano, TX (US); Daniel Joseph Friedman, Sleepy Hollow, NY (US); and Baibhab Chatterjee, West Lafayette, IN (US)
Assigned to International Business Machines Corporation, Armonk, NY (US)
Filed by International Business Machines Corporation, Armonk, NY (US)
Filed on Apr. 18, 2022, as Appl. No. 17/723,165.
Prior Publication US 2023/0336123 A1, Oct. 19, 2023
Int. Cl. H03B 5/12 (2006.01); H01G 5/40 (2006.01)
CPC H03B 5/1253 (2013.01) [H01G 5/40 (2013.01); H03B 5/1293 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A variable capacitor device, comprising:
first and second control paths which are configured to enable differential control of the variable capacitor device in response to a differential control signal applied to first and second transistors of a same doping type in the first and second control paths, respectively;
wherein the first and second transistors are configured as voltage variable resistors for tuning a capacitance of the variable capacitor device.