Patent ID: 8717115
Filing Date: 2014-05-06
Classification: H03B

Abstract:
1. A resonator circuit enabling temperature compensation, the resonator circuit comprising: an inductor coupled between a first node and a second node of the resonator circuit; a capacitor circuit coupled between the first node and the second node; and a temperature compensation circuit coupled between the first node and the second node, wherein the resonator circuit is coupled to receive a current signal from a programmable current source; and wherein the temperature compensation circuit comprises a varactor coupled to receive a temperature control signal that sets a capacitance of the varactor, and a first resistor coupled to an emitter of a bipolar junction transistor and to a gate of an MOS transistor, wherein the temperature control signal is generated by the MOS transistor, and a gate of the MOS transistor is coupled to receive a voltage generated at the emitter of the bipolar junction transistor.