Stable oscillator

Oscillators – Automatic frequency stabilization using a phase or frequency... – Particular frequency control means

Reexamination Certificate

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Details

C331S111000, C331S143000, C331S175000, C331S17700V

Reexamination Certificate

active

06853258

ABSTRACT:
An oscillator includes a comparator and a variable voltage element. The comparator has a first input set to a reference voltage, a second input, and an output configured to produce an output voltage as a function of the voltages at the first and second inputs. The variable voltage element delivers to the second input a second voltage that is a function of a switched current. The switched current is a function of the reference voltage.

REFERENCES:
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patent: 5745323 (1998-04-01), English et al.
patent: 5760617 (1998-06-01), Coln et al.
patent: 5859571 (1999-01-01), Lee et al.
patent: 5862069 (1999-01-01), Nestler
patent: 5872469 (1999-02-01), Nestler
Analog Devices, Inc., Active Energy Metering IC With DI/DT Sensor Interface, ADE7759, pp. 1-33, 2001.
Analog Devices, Inc., Energy Metering IC With Integrated Oscillator, ADE7757, pp. 1-15, 2002.
South African Micro-Electronics Systems LTD, Pin Selectable Three Phase Power/Energy Metering IC for Stepper Motor/Impulse Counter Applications With Anti Tamper Features, SA2005M, pp. 1-12, May, 9, 2002.

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