Digital apparatus for generating gating signals in response to a

Details Digital apparatus for generating gating signals in response to a Digital apparatus for generating gating signals in response to a

1990-08-31

1991-06-18

Hudspeth, David

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307360, 307385, 307473, 307451, H03K 19094

Patent

active

050251821

ABSTRACT:
An apparatus for generating first and second digital gating signals in response to a data signal. The first gating signal and the second gating signal are selectively isolatable from each other according to a state signal. The apparatus comprises a gate signal circuit for receiving the data signal and generating the first gating signal on a first line and the second gating signal on a second line. A state input circuit receives the state signal and distributes a plurality of control signals representative of the state signal to the apparatus. An override circuit imposes values on the first and second lines in response to the control signals. The override circuit electrically isolates the first line from the second line in response to the control signals. In a preferred embodiment, the apparatus also includes a DRIVE-HIGH circuit for controlling the override circuit. The DRIVE-HIGH circuit is configured to operate when the state signal is in a first state to detect when a drive signal goes high, and responds to the driver signal going high by gating the override circuit appropriately to effect electrical disconnection of the first line and the second line. The DRIVE-HIGH circuit maintains such electrical isolation between the first line and the second line until the state signal changes to a second state.

REFERENCES:
patent: 4074150 (1978-02-01), Buckley, III et al.
patent: 4408135 (1983-10-01), Yuyama et al.
patent: 4567385 (1986-01-01), Falater et al.
patent: 4682054 (1987-07-01), McLaughlin
patent: 4916337 (1990-04-01), Leung et al.

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