A high-speed,wide-bandwidth,amplification and peak-holding circuit

A high-speed,wide-bandwidth,amplification and peak-holding circuit is introduced briefly in this paper.This circuit was developed for beam position monitor electronics,it is a key front-end device of the system.It consists of amplifying circuit and peak-holding circuit.It can be used to amplify small,fast voltage signals.In order to keep phase excursion as low as possible,dc coupling mode was adopted to construct the amplifying circuit.Moreover,we take differential amplifier and low-pass filter to restrain the dc excursion.Bandwidth of the circuit is≥70MHz,gains≥700.