Patent ID: 9705711
Date: 2017-07-11
CPC Classifications: H03D,H04L

Claim:
1. A mixer, comprising: a weighting module configured to receive an input signal and weight the input signal with a set of weighting factors to generate a set of weighted signals; and a switching module configured to receive the set of weighted signals and at least a portion of 2N periodic control signals, each periodic control signal having a period of 2N*Tvco which contains a pulse with a pulse width not greater than Tvco; wherein Tvco denotes a period of a voltage control oscillating (VCO) signal, N is an integer, and the pulses of the 2N periodic control signals do not overlap with each other; and whereby the switching module cyclically outputs the set of weighted signals, under the control of the received periodic control signals, to generate an output signal having a frequency shift of m/(2N*Tvco) as compared with the input signal, where m is an integer and 0<m<N; wherein the set of weighting factors are selected from a weighting coefficient set or a subset thereof, and wherein the weighting coefficient set is a set of coefficients generated by quantizing a function  where i=0, 1, 2, . . . (2N−1), and A, B and θ are all predefined real numbers.