Patent ID: 6160458
Filing Date: 2000-12-12
Classification: H03J,H03L

Abstract:
A temperature compensated oscillation circuit comprising:an electronic package having four external electrical connections;an oscillator for producing a signal including an oscillation cycle;a detector circuit connected to said oscillator, said detector circuit for detecting a particular point of said oscillation cycle; andan integrated circuit, said integrated circuit comprising:a switched capacitor array connected to said oscillator, said switched capacitor array for switching a capacitive load of said oscillator responsive to the detection of the particular point of said oscillation cycle;a memory circuit for storing data related to the switching of said switched capacitor array;a control circuit connected to said memory circuit and to said switched capacitor array; anda temperature sensing circuit for sensing a temperature about said oscillator and for providing a digital temperature signal to said control circuitry, said temperature compensated oscillation circuit providing an output frequency, said oscillator and said integrated circuit being inside said electronic package.