초록 ▼

A circuit for generating a succession of fast rising voltage pulses comprises an inductor connected between first and second circuit nodes, a step recovery diode connected between a reference potential level and the first circuit node, and a current switch having a first state in which it conducts c

A circuit for generating a succession of fast rising voltage pulses comprises an inductor connected between first and second circuit nodes, a step recovery diode connected between a reference potential level and the first circuit node, and a current switch having a first state in which it conducts current in one direction with respect to the second circuit node and a second state in which it conducts current in the opposite direction with respect to the second circuit node. An oscillator is connected to the current switch for alternately and repeatedly placing the current switch in its first state and its second state. Preferably, the oscillator comprises a SAW resonator having a high Q and a parallel LC tank circuit having a low Q, connected in a closed positive feedback loop.

대표청구항 ▼

An oscillator comprising a first resonator, a second resonator having a quality factor which is substantially smaller than that of the first resonator, and means connecting the first and second resonators in a closed positive feedback loop, said first resonator being a surface acoustic wave resonato

An oscillator comprising a first resonator, a second resonator having a quality factor which is substantially smaller than that of the first resonator, and means connecting the first and second resonators in a closed positive feedback loop, said first resonator being a surface acoustic wave resonator.