GB1314449A - Electric signal converter - Google Patents
Electric signal converterInfo
- Publication number
- GB1314449A GB1314449A GB2666070A GB2666070A GB1314449A GB 1314449 A GB1314449 A GB 1314449A GB 2666070 A GB2666070 A GB 2666070A GB 2666070 A GB2666070 A GB 2666070A GB 1314449 A GB1314449 A GB 1314449A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- analogue
- digital
- counter
- stochastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/60—Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers
- G06F7/70—Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers using stochastic pulse trains, i.e. randomly occurring pulses the average pulse rates of which represent numbers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/04—Analogue/digital conversion; Digital/analogue conversion using stochastic techniques
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/50—Analogue/digital converters with intermediate conversion to time interval
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/66—Digital/analogue converters
- H03M1/82—Digital/analogue converters with intermediate conversion to time interval
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Mathematical Optimization (AREA)
- Mathematical Analysis (AREA)
- Computing Systems (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Computational Mathematics (AREA)
- Analogue/Digital Conversion (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
Abstract
1314449 Stochastic converters; random numbers SOC GENERALE DE CONSTRUCTIONS ELECTRIQUES ET MECANIQUES ALSTHOM 2 June 1970 [2 June 1969 2 Dec 1969 18 Dec 1969 20 Jan 1970 13 Feb 1970 9 March 1970] 26660/70 Headings G4D and G4H [Also in Division H4] In an analogue to digital or digital to analogue converter an intermediate step is made to a stochastic representation of the input signal which is then converted to the output signal. In one arrangement of an analogue to digital converter (Fig. 15) a counter 57 generates an output digital signal on parallel lines 49 which is converted to a stochastic representation 22 by comparison at 19 with a quasi-random noise signal 20. A band-pass filter 23 converts the stochastic signal to an analogue signal which is compared (53-54) with the input analogue signal to drive the counter 57 up or down. The frequency of clock pulses driving the counter 57 is made dependent upon the size of the error signal from comparator 54 (Figs. 19 and 20, not shown). The time constant of the band-pass filter 23 is made dependent upon the size of the output analogue signal 24 (Figs. 24-26, not shown). In another arrangement of an analogue to digital converter (Fig. 3, not shown) the input analogue signal is converted to a stochastic representation which drives a two-way counter in one direction. The digital output of the counter is converted to a stochastic representation to drive the counter in the opposite direction so that the output of the counter is the digital representation of the input analogue signal. In an arrangement of a digital to analogue converter (Fig. 4) an input digital signal on parallel leads 18 is compared at 19 with the signal 20 of a quasi-random noise generator 21 consisting of a clock-driven shift register 25 having feed-back via an exclusive OR-gate 26. The stochastic digital signal 29 is shaped by trigger stages 28 and 30 and converted to the output analogue signal by band-pass filter 23. Instead of a comparator 19 the input signal may be presented in complement form and a halfadder used (Figs. 7-12, not shown).
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR6918122A FR2061840A5 (en) | 1969-06-02 | 1969-06-02 | |
FR6941626A FR2070373A6 (en) | 1969-06-02 | 1969-12-02 | |
FR6943997A FR2071135A6 (en) | 1969-06-02 | 1969-12-18 | |
FR7002023A FR2074717B2 (en) | 1969-06-02 | 1970-01-20 | |
FR7005344A FR2077797A6 (en) | 1969-06-02 | 1970-02-13 | |
FR7008808A FR2081165A6 (en) | 1969-12-02 | 1970-03-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1314449A true GB1314449A (en) | 1973-04-26 |
Family
ID=27546316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2666070A Expired GB1314449A (en) | 1969-06-02 | 1970-06-02 | Electric signal converter |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2027015A1 (en) |
GB (1) | GB1314449A (en) |
NL (1) | NL7008014A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2600606A1 (en) * | 1975-01-10 | 1976-07-15 | Gen Instr Microelect | CIRCUIT FOR A CALL SYSTEM WITH M OF N FREQUENCIES |
DE2614751A1 (en) * | 1975-04-08 | 1976-10-21 | Philips Nv | CIRCUIT ARRANGEMENT FOR CONVERTING A DIGITAL SIGNAL INTO A STOCHASTIC SIGNAL |
WO1991020066A1 (en) * | 1990-06-18 | 1991-12-26 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Intelligent signal processing |
GB2260664A (en) * | 1990-06-18 | 1993-04-21 | Secr Defence | Intelligent signal processing |
GB2270595A (en) * | 1992-09-09 | 1994-03-16 | Guy De Warrenne Bruce Adams | Digital to analogue conversion |
-
1970
- 1970-06-02 NL NL7008014A patent/NL7008014A/xx unknown
- 1970-06-02 DE DE19702027015 patent/DE2027015A1/en active Pending
- 1970-06-02 GB GB2666070A patent/GB1314449A/en not_active Expired
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2600606A1 (en) * | 1975-01-10 | 1976-07-15 | Gen Instr Microelect | CIRCUIT FOR A CALL SYSTEM WITH M OF N FREQUENCIES |
DE2614751A1 (en) * | 1975-04-08 | 1976-10-21 | Philips Nv | CIRCUIT ARRANGEMENT FOR CONVERTING A DIGITAL SIGNAL INTO A STOCHASTIC SIGNAL |
JPS51123501A (en) * | 1975-04-08 | 1976-10-28 | Philips Nv | Signal converter |
JPS5626176B2 (en) * | 1975-04-08 | 1981-06-17 | ||
WO1991020066A1 (en) * | 1990-06-18 | 1991-12-26 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Intelligent signal processing |
GB2260664A (en) * | 1990-06-18 | 1993-04-21 | Secr Defence | Intelligent signal processing |
GB2260664B (en) * | 1990-06-18 | 1994-03-09 | Secr Defence | Intelligent signal processing |
GB2270595A (en) * | 1992-09-09 | 1994-03-16 | Guy De Warrenne Bruce Adams | Digital to analogue conversion |
US5420585A (en) * | 1992-09-09 | 1995-05-30 | Peter Qvortrup | Digital to analog conversion devices |
GB2270595B (en) * | 1992-09-09 | 1995-12-06 | Guy De Warrenne Bruce Adams | An audio system |
Also Published As
Publication number | Publication date |
---|---|
DE2027015A1 (en) | 1970-12-10 |
NL7008014A (en) | 1970-12-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |