Analog varactor

Details Analog varactor Analog varactor

2008-07-01

2008-07-01

Chang, Joseph (Department: 2817)

Oscillators

With frequency adjusting means

With voltage sensitive capacitor

C331S179000

Reexamination Certificate

active

11227421

ABSTRACT:
An oscillator includes a plurality of varactor cells to receive a control signal to control a frequency of the oscillator. Each of the varactor cells includes a switch that includes a first terninal to receive the control signal and a second terminal such that the switch operates to control a capacitance of the varactor cell in response to a voltage between the first and second terminals. The oscillator includes a bias circuit to provide a different bias voltage to each second terminal and an amplifier that is coupled to the varactor cells to generate an oscillating signal.

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patent: 0 431 887 (1991-06-01), None
patent: 1 555 753 (2005-07-01), None

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