| 摘要 |
PCT No. PCT/FR80/00059 Sec. 371 Date Dec. 19, 1980 Sec. 102(e) Date Dec. 4, 1980 PCT Filed Apr. 15, 1980 PCT Pub. No. WO80/02348 PCT Pub. Date Oct. 30, 1980.High-speed, digital/analog converter using a logic circuit with coupled emitters comprising a first stage formed by logic gates having a plurality of inputs and one output and a second current amplification stage formed by the same number of transistors as there are logic gates, e.g. transistor having an emitter, a base and a collector, each case of a transistor of the second stage being connected to the output of a logic gate of the first stage, said logic circuit also having a first supply line and a voltage Vcc1 and connected to all the collectors of the transistors of the amplification stage, a second supply line at voltage Vcc2, which differs from the first and is connected to the logic gates of the first stage and a third supply line at a voltage VEE and connected to the two stages, wherein the converter comprises resistors connected to the emitters of transistors, resistor connected to the transistor of rank k having the value R/2k, while all the resistors are joined in parallel to the line VEE, a matched load line connected to the first line Vcc1 via a constant current subtracting circuit, each bit of rank k of the digital signal to be converted being applied to the input of the logic gate connected to the transistor of the same rank k, the analog conversion signal being constituted by the total current Is flowing in the load line.
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