Power supply, temperature, and load capacitance compensating, co

Details Power supply, temperature, and load capacitance compensating, co Power supply, temperature, and load capacitance compensating, co

1993-04-21

1994-05-10

Westin, Edward P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307446, 307310, 307475, H03K 19003, H03K 1908, H03K 190175

Patent

active

053110773

ABSTRACT:
A controlled slew rate output buffer has an input stage that generates a charging current in response to the rising edge of an input signal and that generates a discharging current in response to the falling edge of the input signal so that both the charging current and the discharging current are substantially constant over a temperature range and a power supply voltage range. A charging stage responds to the charging current by charging an intermediate node at a first slew rate that is substantially constant over the temperature range and the power supply voltage range. A discharging stage responds to the discharging current by discharging the intermediate node at a second slew rate that is substantially constant over the temperature range and the power supply voltage range. A charging output stage responds to the charging of the intermediate node and charges an output node at a third slew rate that is substantially equivalent to the first slew rate and that is substantially constant over the temperature range, the power supply voltage range, and an output capacitance range. A discharging output stage responds to the discharging of the intermediate node and discharges the output node at a fourth slew rate that is substantially equivalent to the second slew rate and that is substantially constant over the temperature range, the power supply voltage range, and the output capacitance range.

REFERENCES:
patent: 4712021 (1987-12-01), Gollinger
patent: 4724343 (1988-02-01), Le Roux et al.
patent: 4857863 (1989-08-01), Gangor et al.
patent: 4947063 (1990-08-01), O'Shaughnessy et al.
patent: 5021684 (1991-06-01), Ahuja et al.

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