Compensated linearity voltage-control-capacitor device by...

Details Compensated linearity voltage-control-capacitor device by... Compensated linearity voltage-control-capacitor device by...

2007-05-29

2007-05-29

Smith, Matthew (Department: 2823)

Semiconductor device manufacturing: process

Voltage variable capacitance device manufacture

C438S382000, C257S595000

Reexamination Certificate

active

10828884

ABSTRACT:
Apparatus and method of providing a CMOS varactor device having improved linearity. At least two differential varactor elements are connected in parallel. Each of the differential elements includes first, second and third doped regions in a well. A first gate controls the first and second regions and a second gate controls the second and third regions. A resistor is formed such that power applied to the bulk region of the two differential elements will differ by the voltage drop across the resistor.

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Su, C.Y. et al., “Scalable RF MIS varactor model,”Electronics Letters, vol. 37 No. 12 (Jun. 7, 2001) pp. 760-761.

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