US3846645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bi-polar pulse generator
Assignee: Westinghouse Electric Corp
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Filing: 1973-10-17
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Granted: 1974-11-05
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Expires: 1993-10-17
Abstract
Abstract A unitary solid state pulse generator of a bi-polar waveform having means for individually varying the amplitude of both the positive and the negative portions of the waveform as well as the bi-polar pulse repetition rate, the waveform baseline and the trailing edge of the positive portion of the output waveform thus providing a multi-variable waveform generator obviating the need for two separate generators or a double pulse generator.
Inventors
- 👤 R Kim
- 👤 L White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:27
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/01
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
208 words
A bi-polar signal generator providing an output having selectively variable waveform characteristics, comprising in combination: a signal source generating a periodic waveform of a selected frequency; first circuit means coupled to said signal source and being operable in response to said periodic waveform to provide a bipolar waveform signal of said selected frequency; second circuit means coupled to said first circuit means and being operable in response to said bi-polar waveform signal to provide a bi-polar square wave signal having positive and negative signal portions; third circuit means coupled to said second circuit means and being responsive to the bi-polar square wave signal to provide a bi-polar output signal; and fourth circuit means coupled to said second and third circuit means and being operable in response to said positive signal portion of said bi-polar square wave signal to selectively vary the pulsewidth of the positive signaL portion of said bi-polar output signal; fifth circuit means coupled to said third and fourth circuit means and being operable in conjunction with said fourth circuit means to selectively vary the voltage amplitude of the waveform baseline existing intermediate said positive and negative signal portions of said bi-polar output signal when said positive signal portion is less than its maximum possible pulsewidth.
Claim 2
Dependent Claim
208 words
A bi-polar signal generator providing an output having selectively variable waveform characteristics, comprising in combination: a signal source generating a periodic waveform of a selected frequency; first circuit means coupled to said signal source and being operable in response to said periodic waveform to provide a bipolar waveform signal of said selected frequency; second circuit means coupled to said first circuit means and being operable in response to said bi-polar waveform signal to provide a bi-polar square wave signal having positive and negative signal portions; third circuit means coupled to said second circuit means and being responsive to the bi-polar square wave signal to provide a bi-polar output signal; and fourth circuit means coupled to said second and third circuit means and being operable in response to said positive signal portion of said bi-polar square wave signal to selectively vary the pulsewidth of the positive signaL portion of said bi-polar output signal; fifth circuit means coupled to said third and fourth circuit means and being operable in conjunction with said fourth circuit means to selectively vary the voltage amplitude of the waveform baseline existing intermediate said positive and negative signal portions of said bi-polar output signal when said positive signal portion is less than its maximum possible pulsewidth.
Claim 3
Dependent Claim
45 words
The bi-polar signal generator as defined by claim 1 wherein said third circuit means comprises a bi-polar signal amplifier circuit including circuit means being operable to selectively and independently vary the amplitude of said positive and negative signal portions of said composite bi-polar output signal.
Claim 4
Dependent Claim
20 words
The bi-polar signal generator as defined by claim 2 wherein said signal source comprises a variable frequency input signal source.
Claim 5
Dependent Claim
40 words
The signal generator as defined by claim 3 and additionally including an external input signal terminal and switch means selectively coupling said variable frequency input signal source and external input signal terminal to the input of said first circuit means.
Claim 6
Dependent Claim
32 words
The bi-polar signal generator as defined by claim 1 wherein said first circuit means comprises a differential amplifier being operable to provide said bi-polar waveform signal in response to said periodic waveform.
Claim 7
Dependent Claim
151 words
The bi-polar signal generator as defined by claim 1 wherein said second circuit means comprises buffer amplifier means coupled to said first circuit means; a bi-polar signal amplifier coupled across a positive and negative supply potential and comprised of a first amplifier coupled to said positive supply potential and a second amplifier coupled to said negative supply potential, said first and second amplifiers having common input connection and a common output connection with said common input connection coupled to the output of said buffer amplifier means, and wherein said first amplifier is responsive to the positive portion of said bi-polar waveform signal to be rendered fully conductive thereby and said second amplifier is responsive to the negative portion of said bi-polar waveform signal to be rendered fully conductive thereby; anid second buffer amplifier means coupled to said common output connection between said amplifier for providing said bi-polar square wave waveform signal.
Claim 8
Dependent Claim
85 words
The bi-polar signal generator as defined by claim 1 wherein said fourth circuit means comprises: time delay pulse generator means rendered operative by said positive signal portion of said bipolar square wave waveform signal to provide a trigger pulse after a predetermined time delay; and sixth circuit means coupled to the input of said third circuit means and being responsive to said trigger pulse and operated thereby to terminate the positive signal portion of said bi-polar square waveform signal applied to said third circuit means.
Claim 9
Dependent Claim
103 words
The bi-polar signal generator as defined by claim 7 wherein said time delay pulse generator means comprises: a normally inoperative pulse generator; a first transistor coupled to said pulse generator, being biased in a normally conductive state to hold said pulse generator inoperative; a second transistor coupled to said first transistor and being biased in a normally non-conductive state and thereby maintain said first transistor conductive, said second transistor being coupled to said second circuit means and being rendered conductive by said positive signal portion of said bi-polar square wave waveform signal to render said first transistor non-conductive and operating said pulse generator.
Claim 10
Dependent Claim
117 words
The bi-polar signal generator as defined by claim 8 wherein said fifth circuit means comprises operational amplifier means having an output terminal providing a variable DC output potential; and wherein said sixth circuit means comprises controlled rectifier means having a pair of power electrodes and a gate electrode, and wherein one of said power electrodes is couplEd to said output terminal of said operational amplifier, the other power electrode is coupled to the input of said third circuit means and said gate electrode is coupled to said pulse generator and being adapted to receive said trigger pulse after a predetermined time delay from the leading edge of said positive signal portion of said bi-polar square wave signal.
Claim 11
Dependent Claim
67 words
The bi-polar signal generator as defined by claim 9 wherein said third circuit means comprises first and second transistor emitter follower circuits having a common input connection and a common output connection, and wherein said first emitter follower circuit is responsive to the portion of said bi-polar square wave signal and said second emitter follower circuit is responsive to the negative of said bi-polar square wave signal.
Claim 12
Dependent Claim
19 words
The bi-polar signal generator as defined by claim 10 wherein said pulse generator comprises a unijunction transistor pulse oscillator.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |