Patent ID: 7224235

Claim:
A phase-accurate multi-phase wide-band radio frequency local oscillator (LO) generator for generating a plurality of LO signals comprising: a shift register comprising a plurality of flip-flops each with a data input, LO signal output, a coupling output, and clock input, the coupling outputs of the flip-flops connected in series and each flip-flop clock input driven by a common clock signal, the first flip-flop data input connected to a pattern signal; each flip-flop comprising a first slave stage, a master stage, and a second slave stage connected in series; wherein the slave stages and the master stage are driven by opposite edges of the clock input signal and the second slave stage drives the LO signal output; wherein each flip-flop outputs an LO signal from the second slave stage to drive a mixer and the master stage of each flip-flop drives the coupling output to a next flip-flop in the series connection.