US3930144A
Expired / Lapsed
US
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Digital function fitter
Assignee: Iwatsu Electric Co Ltd
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Filing: 1974-09-20
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Granted: 1975-12-30
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Expires: 1994-09-20
Abstract
Abstract A digital function fitter includes an UP/DOWN counter, a clock pulse generator, a counter counting the number of the clock pulses, a plurality of gate circuits and a Multiplexer for supplying selectively the digital outputs of the gate circuits to the UP/DOWN counter. A non-linear digital input is applied to the up-terminal of the UP/DOWN counter and the digital outputs from the gate circuits are applied to the down-terminal of the UP/DOWN counter. A linearized digital value can be obtained from the counter when the number of the non-linear digital input coincides with the digital outputs from the gate circuits.
Inventors
- 👤 Katsuaki Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:26
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/60; G06F7/62
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
90 words
A digital function fitter comprising: means for storing a number of input pulses; a first clock pulse generator; means for counting the number of clock pulses; a plurality of second clock pulse generators generating pulses different from one another in frequency; and means for supplying clock pulses with different frequencies for predetermined intervals to said storing means, said clock pulses ceasing to be applied by said first clock pulse generator to said counting means when the pulses supplied to said storing means coincide with a stored number of input pulses.
Claim 2
Dependent Claim
90 words
A digital function fitter comprising: means for storing a number of input pulses; a first clock pulse generator; means for counting the number of clock pulses; a plurality of second clock pulse generators generating pulses different from one another in frequency; and means for supplying clock pulses with different frequencies for predetermined intervals to said storing means, said clock pulses ceasing to be applied by said first clock pulse generator to said counting means when the pulses supplied to said storing means coincide with a stored number of input pulses.
Claim 3
Dependent Claim
24 words
A digital function fitter according to claim 1, wherein said storing means is an UP/DOWN counter, and said counting means is a decade counter.
Claim 4
Dependent Claim
30 words
A digital function fitter according to claim 1, wherein said clock pulse supplying means comprises a plurality of gate circuits, a shift register, a second pulse generator and a multiplexer.
Claim 5
Dependent Claim
60 words
A digital function fitter according to claim 2, wherein a three input terminal AND-circuit is connected between said UP/DOWN counter and said decade counter and wherein the output of said first clock pulse generator, an end pulse signifying the end of said input pulses, and the output of said UP/DOWN counter are applied to the input terminals of said AND-circuit.
Claim 6
Dependent Claim
29 words
A digital function fitter according to claim 3, wherein said shift register and said second pulse generator are operated by said means for counting the number of clock pulses.
Claim 7
Dependent Claim
22 words
A digital function fitter according to claim 3, wherein each of said gate circuits comprises a plurality of AND-circuits and one OR-circuit.
Claim 8
Dependent Claim
21 words
A digital function fitter according to claim 1, wherein said storing means comprises first and second counters, and a digital comparator.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |