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Bipolar Bit Driver

IP.com Disclosure Number: IPCOM000075699D
Original Publication Date: 1971-Nov-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Gersbach, JE: AUTHOR

Abstract

This driver provides a drive pulse at either one of two output terminals B1 or B0 upon the application of a single data input. The simultaneous application of a positive data input pulse and gate input pulse to the data and gate input terminals causes diodes 10 and 12 to be back biased thereby allowing the voltages at node 14 to rise sufficiently to turn transistor 16 on, which drops the voltage an the B1 output terminal, thereby providing an output signal there.

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Bipolar Bit Driver

This driver provides a drive pulse at either one of two output terminals B1 or B0 upon the application of a single data input. The simultaneous application of a positive data input pulse and gate input pulse to the data and gate input terminals causes diodes 10 and 12 to be back biased thereby allowing the voltages at node 14 to rise sufficiently to turn transistor 16 on, which drops the voltage an the B1 output terminal, thereby providing an output signal there.

The collector voltage at transistor 16 is also fed to diode 18.

This maintains diode 18 conducting and transistor 20 back biased even with the application of the gate input signal to diode 22. Thus with a positive data input signal to diode 10 when a gate input signal is applied to diodes 12 and 22, 20 maintains the voltage at output terminal B0 at an up level, while the voltage at output terminal B1 is driven to down level.

If a positive data pulse is not supplied to diode 10 when a gate input pulse is supplied to diode 12. Diode 10 will conduct keeping transistor 16 off and thus providing positive potential to the B(1) output and to the diode 18. Application of this positive potential to diode 18, with the application of the positive gate input signal to diode 22, causes the voltage at node 24 to rise thereby causing transistor 20 to conduct. Thus the application of a gate input signal to the gate input terminal, with the absence of an input signal to the data input terminal, provide...