Patent ID: 9453906
Filing Date: 2016-09-27
CPC Classification: G01S,H03K

Claim Text:
1. A phase calibration circuit device comprising: a first signal splitter receiving a local oscillator (LO) input signal, and outputting an output A and an output B; a first signal adjustment circuit comprising a first phase shifter, wherein said first signal adjustment circuit comprises a phase control signal port, a signal adjustment input signal port, and a signal adjustment output signal port; a second signal splitter receiving a first signal adjustment output signal from said first phase shifter, said second signal splitter comprising a LO output and an output C; a phase detection circuit receiving said output signal B from said first signal splitter and said output signal C from said second signal splitter, said phase detection circuit comprising a phase detection circuit output signal that is related to a phase difference between said signal B and said signal C; and a negative feedback loop wherein phase offset is reduced.