Patent ID: 6049256
Filing Date: 2000-04-11
Classification: H03H,H03L

Abstract:
An ovenized oscillator operable to provide an oscillator signal, comprising:a) a planar aluminum nitride substrate having a first surface, an opposed second surface and a cavity located in the second surface, the second surface surrounding the cavity;b) a plurality of electrically conductive vias passing through the substrate between the first surface and the cavity;c) a plurality of connectors mechanically and electrically attached to the via and extending into the cavity;d) a resonator, disposed in the cavity and supported by the connectors for stabilizing the oscillator signal, the resonator electrically connected to the connectors;e) a cover sealing the resonator in the cavity;f) a conditioning circuit, located on the first surface and electrically connected to the via, for conditioning the oscillator signal;g) a transistor heater, located on the second surface, adjacent the cavity and thermally communicated with the cavity through the aluminum nitride substrate for heating the resonator, the heater electrically connected to the conditioning circuit; andh) a temperature sensor, mounted on the second surface, adjacent the cavity and thermally communicated with the cavity through the aluminum nitride substrate for monitoring the resonator temperature, the temperature sensor electrically connected to the conditioning circuit, the conditioning circuit operable to control the heater in response to the temperature sensor.