Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Patent
1998-01-23
2000-02-15
Young, Brian
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
H03M 112
Patent
active
06025792&
ABSTRACT:
An analog compensation circuit for providing process/voltage/temperature (PVT) bias compensation signals for input/output (I/O) circuitry within an integrated circuit includes a first current source coupled to a first node. A first load coupled to the first current source and a second node provides a first reference voltage. A voltage divider coupled between the first and second nodes provides a current source bias voltage to the first current source. A differential amplifier generates a first bias compensation signal as feedback for the first current source in accordance with the difference between the first reference voltage and a second reference voltage. With the addition of logic level bias converters, the compensation circuitry is capable of providing bias compensation signals to multiple logic families. The bias compensation signals can be applied to current sources used to control the functioning of integrated circuit I/O circuitry so that the I/O circuitry operates substantially independently of PVT variations.
REFERENCES:
patent: 4594558 (1986-06-01), Congdon
Intel Corporation
Young Brian
LandOfFree
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