Filter circuitry and circuitry comprising the same

Abstract

Polyphase filter circuitry including: an input node to receive an input signal VIN having a dominant frequency fPPF; and a common-source amplifier circuit. The common-source amplifier circuit includes a field-effect transistor M1 with its gate terminal connected to the input node and with a capacitor CPFF connected to its source terminal; and for the common-source amplifier circuit, the output resistance RM1 at the source terminal of the field-effect transistor M1 and the capacitance of the capacitor CPFF are define the frequency response of the common-source amplifier circuit so that, based on the input signal VIN, a signal VLEAD is generated at the drain terminal of the transistor M1 which leads the input signal VIN in phase by a given phase shift ΔϕLEAD and a signal VLAG is generated at the source terminal of the transistor M1 which lags the input signal VIN in phase by a given phase shift ΔϕLAG.

Dependencies are inferred from the claim text.