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Digital step attenuator
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Patent number 11,121,702
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Issue date Sep 14, 2021
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Chengdu Sicore Semiconductor Corp. Ltd.
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Cemin Zhang
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H01 - BASIC ELECTRIC ELEMENTS
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Signal attenuators
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Patent number 6,472,949
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Issue date Oct 29, 2002
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Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
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Kazuji Yamazaki
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H03 - BASIC ELECTRONIC CIRCUITRY
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3437933
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Patent number 3,437,933
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Issue date Apr 8, 1969
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3217241
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Patent number 3,217,241
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Issue date Nov 9, 1965
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H03 - BASIC ELECTRONIC CIRCUITRY
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2960667
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Patent number 2,960,667
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Issue date Nov 15, 1960
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G05 - CONTROLLING REGULATING