Patent ID: 11947031
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A device, comprising:
a phase shifter comprising:
a signal input configured to receive an oscillating signal;
a control input configured to receive a control signal; and
an output;

an in-phase channel/quadrature phase channel (I/Q) signal generator, comprising:
an input coupled to the output of the phase shifter;
a first output; and
a second output;

an in-phase (I) channel mixer comprising an input coupled to the first output of the I/Q signal generator;
a quadrature (Q) channel mixer comprising an input coupled to the second output of the I/Q signal generator, wherein the Q channel mixer further comprises an output; and
an analog feedback path between the output of the Q channel mixer and the control input of the phase shifter, the analog feedback path comprising a filter comprising an input coupled to the output of the Q channel mixer and configured to receive a Q phase component of the oscillating signal, the filter further comprising an output, the analog feedback path further comprising an integrator having an input coupled to the output of the filter and an output coupled to the control input of the phase shifter, the integrator configured to output the control signal at the output of the integrator.