运算放大器表征的简化测试规定The test set described in this paper allows complete quantitativecharacterization of all dc operational amplifier parametersquickly and with a minimum of additional equipment.The method used is accurate and is equally suitable for laboratoryor production test—for quantitative readout or for limittesting. As embodied here, the test set is conditioned fortesting the LM709 and LM101 amplifiers; however, simplechanges discussed in the text will allow testing of any of thegenerally available operational amplifiers.Amplifier parameters are tested over the full range of commonmode and power supply voltages with either of two outputloads. Test set sensitivity and stability are adequate fortesting all presently available integrated amplifiers.The paper will be divided into two sections, i.e., a functionaldes cription, and a discussion of circuit operation. Completeconstruction information will be given including a layout forthe tester circuit boards.FUNCTIONAL DEs criptIONThe test set operates in one of three basic modes. Theseare: (1) Bias Current Test; (2) Offset Voltage, Offset CurrentTest; and (3) Transfer Function Test. In the first two of thesetests, the amplifier under test is exercised throughout its fullcommon mode range. In all three tests, power supply voltagesfor the circuit under test may be set at ±5V, ±10V,±15V, or ±20V.
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