Patent ID: 9240792
Filing Date: 2016-01-19
CPC Classification: H03B,H03J,H03L

Claim Text:
1. A periodic signal generator, comprising: a resonant LC tank circuit configured to generate a periodic reference signal at a first frequency at a differential output thereof; and a temperature-responsive frequency compensation module electrically coupled to the differential output of said resonant LC tank circuit, said temperature-responsive frequency compensation module comprising: wherein each of the first and second arrays of switchable capacitive modules comprises a respective binary-weighted array of fixed capacitors and a binary-weighted array of voltage-controlled variable capacitors that are responsive to the plurality of switching coefficients; wherein each of the fixed capacitors in the binary-weighted array of fixed capacitors is associated with a corresponding voltage-controlled variable capacitor in the binary-weighted array of voltage-controlled variable capacitors; wherein within each of the switchable capacitive modules, either the corresponding fixed capacitor or the corresponding voltage-controlled variable capacitor is active, but not both at the same time; and wherein when a voltage-controlled variable capacitor is active it has a first terminal responsive to the temperature dependent control voltage and when a voltage-controlled variable capacitor is inactive its first terminal is responsive to a fixed voltage.