Patent ID: 9692428
Date: 2017-06-27
CPC Classifications: H03L,H04B

Claim:
1. An oscillator circuit, comprising: a first oscillator for generating a first output frequency signal in response to a control frequency signal; a second oscillator for generating a second output frequency signal in response to the control frequency signal; a low frequency generator for generating the control frequency signal; and a feedback circuit for generating a feedback signal in response to a selected one of the first output frequency signal and the second output frequency signal and for coupling the feedback signal to a control input of at least one low frequency generator component of the low frequency generator, wherein the control frequency signal is generated in response to the coupled feedback signal; a first switch for selectively coupling an output of a first digital-to-analog converter (DAC) to a control input of the first oscillator, comprising a second switch for selectively coupling the control frequency signal to the control input of the first oscillator, comprising a third switch for selectively coupling an output of a second DAC to a control input of the second oscillator, and comprising a fourth switch for selectively coupling the control frequency signal to the control input of the second oscillator, and wherein the second output frequency signal is generated simultaneously as the first output frequency signal in a calibration mode.