Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Patent
1996-12-05
1998-10-27
Williams, Howard L.
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
323315, G05F 326, H03M 100
Patent
active
058283293
ABSTRACT:
A current reference combines proportional to absolute temperature and complementary to absolute temperature current sources to produce a current reference that is relatively immune to power supply variations and features a temperature coefficient which may be adjusted to yield a positive, negative or zero tempco. In its preferred embodiment, the new current reference may be advantageously employed within an analog to digital converter (ADC) to yield equal quantization values in spite of variations in the ADC's supply voltage and temperature. Additionally, the tempco may be adjusted to permit the ADC's quantization valued to "track" variations in circuitry which produce the analog signals converted by the ADC.
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3Com Corporation
Jean-Pierre Peguy
Williams Howard L.
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