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US4584489A
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Multichannel time-voltage converter
Assignee: Horiba Ltd
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Filing: 1984-07-24
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Granted: 1986-04-22
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Expires: 2004-07-24
Abstract
Abstract A multichannel time-voltage converter generates a plurality of output voltages which respectively corresponds to the time period between a start pulse and each of a plurality of stop pulses. A single sawtooth wave generator is utilized with a plurality of track and hold circuits so as to obviate the need for separately calibrating each of the plurality of channels of the converter.
Inventors
- 👤 Masaru Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:04
CPC Classifications
H; H03; H03M; H03M9/00; H03K; H03K5/00; H03K5/15; H03K5/15013; H03K5/1506; H03K5/15066; H03K9/00; H03K9/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
189 words
A multichannel time-voltage converter for generating a plurality of voltages which respectively correspond to the time period between a start pulse and each of a plurality of stop pulses, said converter comprising: a sawtooth wave generator circuit for generating a sawtooth wave; a plurality of track and hold circuits having their inputs connected to an output of said sawtooth wave generator and having separate outputs for each of said plurality of circuits; a sequencer means operatively connnected to said sawtooth wave generator and to said plurality of track and hold circuits for controlling said generator and said circuits in response to said start pulse and said plurality of stop pulses which are input thereto; wherein said sequencer starts generation of a sawtooth wave in response to said start pulse and causes said plurality of track and hold circuits to respectively sequentially track and hold a value of said sawtooth wave in response to said stop pulses such that the time period between said start pulse and each of said plurality of stop pulses are converted to respective voltages which are held and output by respective track and hold circuits.
Claim 2
Dependent Claim
189 words
A multichannel time-voltage converter for generating a plurality of voltages which respectively correspond to the time period between a start pulse and each of a plurality of stop pulses, said converter comprising: a sawtooth wave generator circuit for generating a sawtooth wave; a plurality of track and hold circuits having their inputs connected to an output of said sawtooth wave generator and having separate outputs for each of said plurality of circuits; a sequencer means operatively connnected to said sawtooth wave generator and to said plurality of track and hold circuits for controlling said generator and said circuits in response to said start pulse and said plurality of stop pulses which are input thereto; wherein said sequencer starts generation of a sawtooth wave in response to said start pulse and causes said plurality of track and hold circuits to respectively sequentially track and hold a value of said sawtooth wave in response to said stop pulses such that the time period between said start pulse and each of said plurality of stop pulses are converted to respective voltages which are held and output by respective track and hold circuits.
Claim 3
Dependent Claim
54 words
A multichannel converter as in claim 1, wherein said sequencer means comprises a plurality of flip-flops which have their outputs respectively connected to said track and hold circuits and a plurality of gate circuits connected to said flip-flops such that each of said stop pulses changes a state of just one of said flip-flops.
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) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |