Oscillators – Automatic frequency stabilization using a phase or frequency... – Particular frequency control means
Reexamination Certificate
2005-02-08
2005-02-08
Wells, Kenneth B. (Department: 2816)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Particular frequency control means
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.
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Analog Devices, Inc., Active Energy Metering IC With DI/DT Sensor Interface, ADE7759, pp. 1-33, 2001.
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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.
English Stephen T.
Nestler Eric G.
Toliver Christopher M.
Analog Devices Inc.
Bromberg & Sunstein LLP
Wells Kenneth B.
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