Switching down-converting RF mixer with embedded single-bit-output all-digital frequency synthesizer

An RF switching down-converting mixer with an embedded single-bit-output all-digital frequency synthesizer is proposed. The output spectrum of the mixer is derived analytically based on that of the synthesizer as well as with simulation. A test setup using an FPGA implementation of the synthesizer and a discrete-component switching mixer has been built. Measurements are presented confirming the theoretical derivations.