Browse Prior Art Database

Flip-Flop

IP.com Disclosure Number: IPCOM000096948D
Original Publication Date: 1962-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Tech, DD: AUTHOR

Abstract

The flip-flop utilizes Zener diodes to enable appreciable output current capability at the significant voltage level.

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Flip-Flop

The flip-flop utilizes Zener diodes to enable appreciable output current capability at the significant voltage level.

Transistors Q1 and Q2 are employed as cross-coupled inverters and also as emitter followers. The emitter load includes a Zener diode CR3 or CR6 which stabilizes the significant output level +V(Capital zeta) at approximately the Zener drop when the corresponding transistor, e.g., Q1, is on. The other transistor Q2 is off. Forward conduction through the associated Zener diode (CR6) clamps the corresponding output level, -V(F), near ground.

Each transistor Q1 and Q2 has a parallel collector supply, consisting of +V1 through resistor R1 and +V2 through diode CR1, and +V1 through R4 and +V2 through CR2, respectively. V2 is smaller than V1 and approximately equal to +V(capital zeta). When output current is drawn at the significant level +V(capital zeta), the voltage drop across the collector resistor of the associated transistor forwardly biases the diode CR1 or CR2 in parallel with the same. The transistor is supplied with sufficient current from V2 to maintain the corresponding Zener diode in its Zener region of operation.

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