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Frequency comparator circuits
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Patent number 4,677,322
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Issue date Jun 30, 1987
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American Telephone and Telegraph Company, AT&T Technologies Inc.
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Klye L. Burson
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H03 - BASIC ELECTRONIC CIRCUITRY
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Schmitt trigger circuit
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Patent number 4,581,545
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Issue date Apr 8, 1986
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AT&T Technologies
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Richard G. Beale
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H03 - BASIC ELECTRONIC CIRCUITRY
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CMOS Operational amplifier
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Patent number 4,554,515
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Issue date Nov 19, 1985
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AT&T Laboratories
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Kyle L. Burson
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H03 - BASIC ELECTRONIC CIRCUITRY
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Switched current mirror
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Patent number 4,544,878
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Issue date Oct 1, 1985
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AT&T Bell Laboratories
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Richard G. Beale
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G05 - CONTROLLING REGULATING
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Switched capacitor circuits
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Patent number 4,531,106
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Issue date Jul 23, 1985
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AT&T Technologies, Inc.
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Apparajan Ganesan
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H03 - BASIC ELECTRONIC CIRCUITRY
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