Patent ID: 6086244
Filing Date: 2000-07-11
Classification: G04G

Abstract:
A temperature compensated clock comprising:waveform generating means for generating a waveform at a preselected frequency;temperature monitoring means responsive to a voltage level input signal independent of temperature and a voltage level input signal proportional to temperature for monitoring variations in temperature, said temperature monitoring means including voltage generating means for generating a temperature dependent voltage level output signal which is linearly dependent on temperature, subtracting means for receiving a temperature independent voltage level input signal and the temperature dependent voltage level input signal and for determining a difference therebetween and responsively producing an output difference signal, converting means responsive to said subtracting means for converting the output difference signal of said subtracting means to a digital output signal; andtemperature compensating means cooperating with said temperature monitoring means for compensating for frequency variations in the generated waveform due to temperature changes and thereby produce a temperature compensated output timing signal, andwherein said temperature monitoring means further includes latching means responsive to said converting means for latching said temperature compensating means with a digital input signal representative of temperature variations.