A transistorized high voltage push-pull sweep generator using high impedance techniques

Summary form only given. Essential to good sweep linearity in a bootstrap sweep generator is high input impedance and a gain which is close to one in the unity gain isolation amplifier which is used. It is shown that an emitter follower circuit is capable of providing a gain which is very close to unity due to the inherently high transconductance of a transistor. A method of bootstrapping the collector of the emitter follower is given which is used to obtain an ultra high input impedance to this unity gain amplifier. The "bootstrapped collector emitter follower" circuit is used in the bootstrap sweep generator to provide a 105 volt sweep which has good linearity. In addition to providing an ultra high input impedance, the bootstrapped collector emitter follower allows the use oflow voltage transistors to obtain emitter followers that can handle high voltages.