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本文介绍一种对数电压比-时间变换器,如图1所示.它实质上是一个包含集成运放的零偏压单稳态电路,其中C、R为定时元件.A_1、A_2均需接调零电位器,补偿电容680微微法接在5脚与地之间,两个运放的供电电压均为±15伏.稳态时,集成运放A_2处于正电压饱和区(由于它的同相端加有正电压V_4).这时A_2失去放大能力.它的输出端(D点)的正电压经电阻R_5加到BG_1基极上,保证BG_1处于截止状态.因此定时电容C两端充到电压-V_0(V_0》V??).A_1接成跟随器,起着隔离作用,消除了后级电路对定时
This article describes a logarithmic voltage-to-time converter, shown in Figure 1. It is essentially a zero-bias monostable circuit with integrated op amp, where C, R for the timing components .A_1, A_2 are required Then adjust the potentiometer, the compensation capacitor 680 pico-law connected between 5 feet and ground, the supply voltage of both op amps are ± 15 V. Steady state, the integrated operational amplifier A_2 in the positive voltage saturation zone (due to its Plus a positive voltage at the same phase V_4) .A2 loss of amplification .And its output (D point) of the positive voltage through the resistor R_5 BG_1 added to the base, to ensure that BG_1 is in the off state.Therefore the timing capacitor C To voltage -V_0 (V_0 "V ??). A_1 connected as a follower, plays a role in isolation, eliminating the circuit after the timing