Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1986-03-14
1988-01-05
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307200B, 307362, 307592, 307597, H03K 1722
Patent
active
047178400
ABSTRACT:
A power-up reset circuit for providing a reset signal for resetting circuit elements such as flip-flops upon the application of power to the circuit includes a CMOS pair output section and a capacitor coupled to the gates of the CMOS transistors. The capacitor is charged up by the power supply to switch the reset signal to a low level after the resetting operation has been achieved. In order to accommodate slow ramping power supplies, circuitry operating as a voltage sensitive switch is included to prevent the capacitor from charging until the power supply voltage has reached a sufficient level to ensure proper operation. In order to accommodate fast ramping power supplies, the charging rate of the capacitor is controlled to assure a minimum necessary duration of the reset signal.
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Marmet Melvin
Ouyang Kenneth W.
Hudspeth D. R.
Miller Stanley D.
Western Digital Corporation
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