Voltage translator

Details Voltage translator Voltage translator

1982-03-16

1985-01-01

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307362, 307475, H03K 508, H03K 19092

Patent

active

044917430

ABSTRACT:
A bipolar voltage translator contains a pair of differentially coupled transistors (Q1 and Q2) for converting an input voltage (V.sub.IN) supplied to one (Q1) of the pair into an output voltage (V.sub.OUT) taken between the other (Q2) and a first resistor (R9). A further transistor (Q4) coupled through a second resistor (R12) to a V.sub.EE supply provides current for the differential pair. A voltage reference circuit (10) containing at least three serially coupled diodes (S5, J3, and J4) with a resistive voltage divider (R13 and R14) across an intermediate one (J3) of the diodes provides the current-source transistor with a reference voltage (V.sub.REF2) that equals V.sub.EE +(1+.alpha.)V.sub.BE where .alpha. is 0.2-3.0. The ratio of the first resistor to the second is desirably .beta./.alpha. where .beta.is the output voltage swing divided by V.sub.BE. If .beta. is 1 and the transistors are NPN devices, the output voltage level is suitable for current tree logic.

REFERENCES:
patent: 3628059 (1971-12-01), Niu
patent: 4195240 (1980-03-01), Otofuji
patent: 4249091 (1981-02-01), Yamagiwa
Signetics Digital 800 Series--TTL/MSI, Data Book, 1971, 8T14 Triple Line Receiver, pp. 177-180.
Signetics Logic--TTL Data Manual, May 1978, 8T38 and 8T380 IC's, pp. 705 and 720-721.
Motorola Inc., Data Book on Emitter Coupled Logic, .COPYRGT.1972, MC10107, MC10124 and MC10125 IC's, pp. 3-11, 3-31, and 3-34.

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