Pulse generator

A pulse generator capable of being connected across first and second conductors from a source of power and comprising a unijunction transistor, a pulse generating transistor, a capacitor operatively connected in series with said unijunction transistor and said pulse generating transistor, a first potentiometer means to control the pulse rate and being connected between said unijunction transistor and said capacitor and said first conductor, a second potentiometer means to control pulse width and being connected between said capacitor and said pulse generating transistor and said first conductor, a transistorized switching means, a current limiting resistor operatively connected to said switching means and being connected between said capacitor and pulse generating transistor, said current limiting resistor being operable by said transistorized switching means and being effectively included in circuit with said capacitor and pulse generating transistor means only at selected charge or discharge times of said capacitor, and an impedance changing amplifier connected to said pulse generating transistor and deriving output pulses.