Method and apparatus for digital to analog conversion using GaAs HI2L process-compatible current switching circuits
作者： White William A
DOI:
关键词: Switching time 、 Computer science 、 Electronic circuit 、 Digital-to-analog converter 、 Bipolar junction transistor 、 State (computer science) 、 Resistor ladder 、 Integrated circuit 、 Electrical engineering 、 Signal
摘要: A digital to analog converter and method for conversion is provided that includes an R-2R resistor ladder network formed with a plurality of current bit switches in GaAs HI2L integrated circuit. Each switch node the associated corresponding position binary signal input converter. An arrangement bipolar transistors (Q1, Q4) diodes (D2-D3) included each (100) steers through one two alternate paths, based on logic state (i e., "high" or "low" state). For signal, flows from output (110). state, flow blocked. Therefore, operates as single-pole-double-throw mode under control (Ai). (Q2, diode (D1 ) also limit voltage swings compensate switching transients, which speeds up recovery time increases overall speed
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