Voltage controlled oscillator with gain control

Details Voltage controlled oscillator with gain control Voltage controlled oscillator with gain control

2007-06-12

2007-06-12

Mis, David (Department: 2817)

Oscillators

With frequency adjusting means

Step-frequency change

C331S025000, C331S17700V, C331S185000

Reexamination Certificate

active

11098110

ABSTRACT:
A VCO circuit including a VCO, a voltage supply and a control circuit. The VCO has a supply voltage input and a gain that changes with its supply voltage. The voltage supply has an adjust input and an output coupled to the supply voltage input of the VCO. The voltage supply adjusts the voltage level of its output in response to changes of the adjust input. The control circuit has a first adjust output coupled to the adjust input of the voltage supply to adjust the gain of the VCO. The VCO may include a frequency range adjust input controlled by the control circuit so that the gain of the VCO is adjusted when the frequency range is changed. For a multi-band VCO, the gain is adjusted for different frequency bands to maintain a relatively constant gain for each frequency band.

REFERENCES:
patent: 4942374 (1990-07-01), Sai
patent: 5949289 (1999-09-01), Smith et al.
patent: 6538521 (2003-03-01), Kobayashi et al.
patent: 6693969 (2004-02-01), Montalvo et al.
patent: 2004072650 (2004-03-01), None

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