US Patent No. 9,246,500

TIME-TO-VOLTAGE CONVERTER USING A CAPACITOR BASED DIGITAL TO ANALOG CONVERTER FOR QUANTIZATION NOISE CANCELLATION


Patent No. 9,246,500
Issue Date January 26, 2016 
Title Time-to-voltage Converter Using A Capacitor Based Digital To Analog Converter For Quantization Noise Cancellation
Inventorship Michael H. Perrott, Nashua, NH (US)
Assignee Silicon Laboratories Inc., Austin, TX (US)

Claim of US Patent No. 9,246,500

1. A phase-locked loop (PLL) comprising:
a capacitor based digital to analog converter (DAC) coupled to receive a digital indication of quantization noise and to supply
a quantization noise correction voltage to adjust a phase error voltage to create a combined voltage with reduced quantization
noise, wherein the phase error voltage is indicative of a phase error corresponding to a time difference between a reference
signal and a feedback signal from an oscillator controlled at least in part based on a value of the combined voltage.