A low-level linear rundown circuit for pulse-height to pulse-width conversion

The two-transistor linear rundown circuit analyzed here is desirable because of its size and economy. The circuit uses one transistor for the constant-current generator and another for an emitter-follower. Waveforms obtained from both experimental and theoretical analysis correlated well enough to plot them as a single waveform. With the addition of a differentiating circuit, this rundown circuit is well suited for the problem of low-level pulse-height to pulse-width conversion.