Bipolar pulse shaping revisited

Compared with unipolar pulse shaping, bipolar shaping is insensitive to misadjusted or missing pole-zero cancellation, doesn´t require a baseline line restorer, and furnishes an amplitude-invariant time marker for coincidence measurements. These characteristics should be useful in amplifier arrays for integrated circuits (ASICs), despite the greater noise and resolving time. With ASIC technology in mind, unipolar and bipolar shaping methods are compared here. An item that emerged from the study is that two CR differentiators and two RC integrators are optimum from a cost-benefit viewpoint. The network can be adjusted to produce the transfer function (sin t-t) exp(-t), which has half the transmission loss and 8% shorter resolving time than the same configuration with all time constants alike