Oscillators – Automatic frequency stabilization using a phase or frequency... – Particular error voltage control
Reexamination Certificate
2006-12-05
2006-12-05
Mis, David (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Particular error voltage control
C327S156000
Reexamination Certificate
active
07145400
ABSTRACT:
A filter couples an output of a phase detector to an input of a voltage controlled oscillator. The filter has a first capacitor and a switch capacitor resistor that is in series with the first capacitor, between the first capacitor and the output of the phase detector. The switch capacitor resistor is to display a resistance that is obtained by switching back and forth a second capacitor to the first capacitor and to the phase detector output. Other embodiments are also described and claimed.
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Applied Ideas, Your Electronic Ideas Could Reward You, “Switched Capacitor Filters for PLL”, Electronic Engineering—May 1983 (pp. 27-28).
Daniel Asta, et al., “Analysis of a Hybrid Analog/Switched-Capacitor Phase-Locked Loop”, IEEE Transactions on Circuits and Systems, vol. 37, No. 2, Feb. 1990 (pp. 183-197).
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Mis David
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