Patent ID: 8466750
Filing Date: 2013-06-18
Classification: H03B,H03L

Abstract:
1. An apparatus comprising: a first varactor of a voltage controlled oscillator (VCO) to receive a control voltage to tune the VCO and generate a VCO output having a frequency F a processor coupled to receive an indication of temperature, categorize the temperature into one of a plurality of temperature regions and generate a signal indicative of the one temperature region corresponding to the temperature; a bias circuit coupled to receive the signal indicative of the one temperature region corresponding to the temperature and to generate a temperature compensated bias signal based on the signal indicative of the one temperature region; and a second varactor coupled to the first varactor and to the bias circuit to respond to the temperature compensated bias signal, in which the temperature compensated bias signal adjusts a bias on the second varactor to compensate for frequency drift of the F