Patent ID: 8816732
Filing Date: 2014-08-26
Classification: H03L

Abstract:
1. A circuit, comprising: a capacitive-load voltage controlled oscillator having a first input configured to receive a first input signal, a second input configured to receive one or more control signals, and an output configured to output an oscillating output signal; and a calibration circuit including: wherein the first and second comparators of the calibration circuit are configured to output respective output signals to the gates of the first and second transistors for varying a voltage at the node to generate the one or more control signals for adjusting a frequency of the oscillating output signal, and wherein the capacitive-load voltage controlled oscillator includes a plurality of inverters coupled in series with one another, each of the plurality of inverters having a respective output coupled to at least two capacitors disposed in parallel with one another and coupled to the output of the inverters through respective switches.