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隧道二极管的特性电流和电压一般采用ГОСТ15606—70提出的电路进行测量。该电路包括一个供隧道二极管和两个记录仪用的偏压电源。它的缺点是测量精度低,原因是在工作点从隧道二极管伏安特性曲线上升部分过渡到发散部分(或反之)的情况下,测定电流和电压时操作人员人为误差造成的。下面介绍一种改进了的电路[苏联发明证书,№603925]。其测量精度的提高是通过自动记录隧道二极管振荡器起振或停振瞬间达到的。图中列出测量仪的方框图,系由触发器1、逆变器2、电阻分压器3、隧道二极管构成的振荡器4、记录仪5、6以及放大器7组成。放大器输出端与触发器1的计数输入端相连。分压器3包括一个固定电阻R和一个可变电阻R_1。
Characteristics of the tunnel diode Current and voltage are generally measured using the circuit proposed by ГОСТ15606-70. The circuit includes a bias supply for the tunnel diode and two recorders. It has the disadvantage of low measurement accuracy due to human error in the measurement of current and voltage at the operating point from the rising part of the tunneling diode’s volt-ampere characteristic curve to the divergent part (or vice versa). Here’s an improved circuit [Soviet invention certificate, № 603925]. Its measurement accuracy is improved by automatically recording the tunnel diode oscillator start or stop vibration instantaneous reach. The block diagram of the measuring instrument is shown in the figure and is composed of a trigger 1, an inverter 2, a resistor divider 3, an oscillator 4 composed of a tunnel diode, a recorder 5, 6 and an amplifier 7. The amplifier output is connected to the count input of flip-flop 1. The voltage divider 3 includes a fixed resistor R and a variable resistor R_1.