Polyphase filter with interphase coupling

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United States of America Patent

PATENT NO 11632098
APP PUB NO 20220311423A1
SERIAL NO

17211716

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Abstract

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An example apparatus includes a polyphase transconductance-capacitor filter. The polyphase filter includes a DC bias voltage node, a plus in-phase filter unit, a minus in-phase filter unit, a plus quadrature-phase filter unit, and a minus quadrature-phase filter unit. Each filter unit respectively includes an input node, an output node, and a control node. The polyphase filter also includes a plus in-phase switch and a minus in-phase switch. The plus in-phase switch is coupled to the control node of the plus in-phase filter unit, the DC bias voltage node, and the input node of one or both of the plus quadrature-phase filter unit and the minus quadrature-phase filter unit. The minus in-phase switch is coupled to the control node of the minus in-phase filter unit, the DC bias voltage node, and the input node of one or both of the plus quadrature-phase filter unit and the minus quadrature-phase filter unit.

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Patent Owner(s)

Patent OwnerAddress
QUALCOMM INCORPORATED5775 MOREHOUSE DRIVE PATENT DEPARTMENT/CENTRAL ADMINISTRATION SAN DIEGO CA 92121

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gathman, Timothy Donald San Diego, US 20 63
Leung, Lai Kan San Marcos, US 61 217
Patel, Chirag Dipak San Diego, US 26 61
Rangarajan, Rajagopalan San Diego, US 39 203
Yu, Xinmin San Diego, US 17 30

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