| 摘要 |
<p>A peak detector for measuring peak values of a voltage generally comprises a voltage comparator circuit (3), a storage element in the form of a capacitor (5), and a charging and discharging circuit (8, 15) for this capacitor. It is proposed to arrange a transistor (8) in common base arrangement between the comparator device (3) and the capacitor (5), the base (9) being connected to a constant voltage (E1) and the reverse base-emitter diode voltage being limited by a diode (13). As a result ofthis, the value of the capacitor (5) can be small, so that with a moderate charging current from the voltage comparator device (3) a fast peak detector is obtained which can measure n:n-recurrent pulses of some volts within nanoseconds in a fairly accurate manner.</p> |
