H - Electricity – 03 – K
Patent
H - Electricity
03
K
328/166
H03K 19/018 (2006.01)
Patent
CA 1194146
ABSTRACT: "Voltage translator." A bipolar voltage translator contains a pair of differentially-coupled transistors for converting an input voltage supplied to the base of a first (Q1) of the pair into an output voltage taken between a first resistor (R9) and the collector of the second (Q2) of the pair. A second resistor (R12) is coupled between a VEE supply and a current-source transistor (Q4) which supplies current to the differential pair. The current-source transistor is controlled by a reference voltage which equals VEE + (1 + ?) VBE where ? is in the range 0.2 to 3Ø The ratio of the first resistor to the second resistor is desirably .beta./? where .beta. VBE is the output voltage swing. Circuitry such as a Schottky diode (S4) is coupled between the emitters of the differential Pair to prevent the emitter-base junction of the second transistor from break- ing down. Where the transistors are NPN devices and .beta. equals 1, the output voltage is provided at levels suitable for current tree logic.
423273
Koninklijke Philips Electronics N.v.
Van Steinburg C.e.
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