Method and apparatus employing a process dependent impedance tha

Details Method and apparatus employing a process dependent impedance tha Method and apparatus employing a process dependent impedance tha

1996-09-30

1998-06-02

Mis, David

Oscillators

Frequency stabilization

331 34, 331 57, 331177R, H03B 504, H03B 524

Patent

active

057606579

ABSTRACT:
A voltage controlled oscillator (VCO) having a current source and a process dependent (or process controlled) impedance is disclosed. The voltage controlled oscillator includes a current mirror that generates a reference current in response to a control current. The reference current is proportional to the control current. The process dependent impedance, which is coupled to the current mirror, compensates the reference current to account for process variations in the manufacture of the (VCO) circuit.

REFERENCES:
patent: 5072197 (1991-12-01), Anderson
patent: 5600281 (1997-02-01), Mori et al.
patent: 5600284 (1997-02-01), Nguyen et al.

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