Transistor linear delay circuit

A transistor delay circuit is described. The operation of the circuit is based on the principle of discharging the timing capacitor of a monostable multivibrator through a constant current device consisting of a transistor operated in the common-base mode. The circuit generates a rectangular pulse whose duration is directly proportional to a d.c. control voltage over a large range. It also generates a linear run down voltage having a good degree of linearity. The range of pulse duration obtainable is largo. The speed of the linear sweep is continuously variable within a certain, range