| 摘要 |
Described herein is an analog signal selector circuit including an input circuit comprising two arrays of semiconductor diodes, all having substantially identical forward-bias characteristics, and an input circuit comprising a noninverting operational amplifier having a feedback loop, in which is operatively connected a forward-biased semi-conductor diode having characteristics matched to those of the two diode arrays. The arrays are connected to input terminals to which discrete analog input signals (DC) are applied. Selective actuation of the diode arrays results in the highest or lowest of the input signals being selected and applied to the operational amplifier, the output of which precisely reproduces the selected input signal, notwithstanding variations in the electrical characteristics of the array diodes as a result of temperature changes. |
