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    • 11. 发明授权
    • Inter-pulse time difference measuring circuit
    • 脉冲间差测量电路
    • US5001683A
    • 1991-03-19
    • US518448
    • 1990-05-07
    • Harutugu FukumotoMuneaki MatsumotoYoshikazu Mizuno
    • Harutugu FukumotoMuneaki MatsumotoYoshikazu Mizuno
    • G01D21/00G01S17/10G04F10/10H03M1/54
    • G04F10/105
    • An inter-pulse time difference measuring circuit which expands the time difference between a first pulse and a second pulse by a given multiplication factor and measures the expanded time difference, thereby realizing a higher measuring resolution. The circuit can be constructed by using a capacitor charging and discharging circuit connected to a constant current source and such circuit can always expand the time difference by a given multiplication factor even if the voltages and resistance values of the other circuits than the constant current circuit are varied with temperature changes. The circuit can also be realized by a circuit which charges and discharges a capacitor through a pair of transistors having a given current ratio and such circuit can maintain the current ratio of the transistors constant without suffering the effect of temperature changes, thereby always ensuring expansion of the time difference between pulses by a given multiplication factor.
    • 一种脉冲间时差测量电路,其以给定的倍增因子扩展第一脉冲和第二脉冲之间的时间差,并测量扩大的时间差,从而实现更高的测量分辨率。 该电路可以通过使用连接到恒流源的电容器充电和放电电路来构造,并且这样的电路可以总是以给定的乘法因子来扩展时间差,即使其他电路的电压和电阻值比恒定电流电路 随温度变化而变化。 电路也可以通过对具有给定电流比的一对晶体管对电容器进行充电和放电的电路来实现,并且这种电路可以保持晶体管的电流比恒定,而不会受到温度变化的影响,从而总是确保扩展 脉冲之间的时间差由给定的倍增因子。