| 摘要 |
PURPOSE:To cancel an offset voltage and to set a bias voltage simultaneously by deciding a gain between polygonal points by one resistor and adding an offset voltage cancellation and bias voltage adding circuit. CONSTITUTION:The gain between optional polygonal points is decided by optional gain adjusting resistors R1-R4 through the provision of signal limiter circuits 30-32, an addition amplifier circuit 61 and subtraction circuits 37-39. Thus, the gain setting and adjustment are simplified. Further, the offset voltage cancellation and bias voltage adder circuit 74 is provided. Then an offset voltage generated in the circuits 30-32, the circuit 61 and the circuits 37-39 is cancelled and the bias of output polygonal points is set easily.
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