Patent ID: 7738597
Filing Date: 2010-06-15
Classification: H03D,H03G

Abstract:
1. A frequency transposition device, comprising: an input terminal for receiving an incident information data signal, the incident information data signal having a spectrum; a modulator of the one-bit delta-sigma type connected to the input terminal and generating a binary data signal; a generator of an analog cosine auxiliary local oscillator signal with a frequency equal to a desired transposition frequency; and a frequency transposer of the Gilbert cell type having a data signal input connected to receive the analog cosine auxiliary local oscillator signal output from the generator, a local oscillator control input connected to receive the binary data signal output from the delta-sigma modulator, and an output delivering a transposed signal, the frequency transposer including a circuit that inverts with negative multiplication and does not invert with positive multiplication the received analog cosine auxiliary local oscillator signal in response to corresponding logic states of the received binary data signal to frequency transpose the spectrum of the incident information data signal to around the desired transposition frequency; wherein the Gilbert cell type frequency transposer comprises: