Comb generators
AssigneeTektronix, Inc.
InventorsAgoston Agoston, Stanley P. Kaveckis
Life of this patent
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Abstract
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.
Claims11
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.
A circuit for generating a fast rising voltage pulse, comprising a step recovery diode connected between a reference potential level and a first circuit node, a current switch for conducting current selectively in two opposite directions with respect to a second circuit node, and an inductor connecting the first and second circuit nodes together.
A circuit for generating a succession of fast rising voltage pulses, comprising a step recovery diode connected between a reference potential level and a first circuit node, a current switch having a first state in which it conducts current in one direction with respect to a second circuit node and a second state in which it conducts current in the opposite direction with respect to said second circuit node, an inductor connecting the first and second circuit nodes together, and an oscillator connected to the current switch for alternately and repeatedly placing the current switch in its first state and its second state.
An oscillator comprising:
- a first resonator which has two terminals,
- a second resonator which has two terminals and has a quality factor which is substantially smaller than that of the first resonator,
- a first bipolar transistor having its emitter connected to one terminal of the first resonator and its base connected to one terminal of the second resonator, and
- a second bipolar transistor having its emitter connected to the second terminal of the first resonator, its base connected to the collector of the first transistor, and its collector connected to the base of the first transistor.
Dependencies are inferred from the claim text.