Time variant drive circuit for high speed bus driver to limit os

Details Time variant drive circuit for high speed bus driver to limit os Time variant drive circuit for high speed bus driver to limit os

1988-03-10

1989-10-31

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307443, 307451, 307594, 307585, 307270, H03K 19003, H03K 1716, H03K 17687, H03K 17284

Patent

active

048779806

ABSTRACT:
A circuit is provided which modifies a digital drive signal to produce a time variant drive signal for application to a gate of a bus driver transistor. The circuit's purpose is to reduce the amplitude of ringing on a bus, due to rapid discharging of current from the bus, in order to prevent unintentional triggering of devices connected to the bus. A P-channel MOS transistor and N-channel MOS transistor are connected so that the digital drive signal is simultaneously applied to the source of the P-channel MOS transistor and to the drain of the N-channel MOS transistor. The gate of the driver transistor is connected to the drain of the P-channel MOS transistor and the source of the N-channel transistor. The width-to-length ratio of the channels of the P-channel and N-channel MOS transistors, and the gate voltages, are chosen so that application of a drive signal to the circuit causes the N-channel MOS transistor to rapidly apply a limited drive signal to the gate of the driver transistor and causes the P-channel MOS transistor to apply a gradually increasing drive signal voltage to the gate of the driver transistor. By choosing the proper width-to-length ratios and gate voltages, the time variant drive signal applied to the gate of the driver transistor will not produce objectionable ringing on the bus when the bus is intended to be at a low level.

REFERENCES:
patent: 3720848 (1973-03-01), Schmidt, Jr.
patent: 4365174 (1982-12-01), Kucharewski
patent: 4577124 (1986-03-01), Koike
patent: 4609836 (1986-09-01), Koike
patent: 4686396 (1987-08-01), Law et al.
patent: 4694206 (1987-09-01), Weinberg
patent: 4725747 (1988-02-01), Stein et al.
patent: 4752704 (1988-06-01), Baccarani et al.
patent: 4754165 (1988-06-01), Cornish
patent: 4760279 (1988-07-01), Saito et al.
patent: 4785203 (1988-11-01), Nakamura

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