Design Of An Internal Clock, A Coincidence And A Synchronization Circuit

Uthayakumar, Maniaras (2005) Design Of An Internal Clock, A Coincidence And A Synchronization Circuit. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The internal clock, coincidence and synchronization circuit will be combined together with other set of project to make into a main project known as ' Versatile Pulse Programmer' which produce the pulse sequence and a ' saturation burst' sequence which useful in the measurement of long relaxation time in solid. The internal clock will produce a symmetric square wave and impendence matcher to the other circuit which need it such as decade divider and synchronization circuit. It contains a 1 MHz crystal oscillator, a Schmidt trigger with coupling and a emitter follower. The lMHz crystal oscillator used to convert the DC input voltage to AC voltage and produce a stable output signal. This circuit also will converting sine wave signal which was produced from the oscillator circuit into square wave signal. The Schmidt trigger circuit will switches the negative output when the input passes upward through a positive reference voltage. At last emitter follower circuit will produce impendence matching to the remaining circuit. The coincidence circuit will be used to select the position of each of the three delayed puJses required ; W, the carr-purcell reset ; the delayed pulse in two pulse sequence ; and R, the reset pulse determining the repetition rate for aU pulse sequence. The synchronization circuit will be used to remove timing errors that accumulated in the preceding circuitry The output 90 and 180 pulses are synchronized with time base clock.

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