SU1132805A3 - Digital-to-analog converter - Google Patents
Digital-to-analog converter Download PDFInfo
- Publication number
- SU1132805A3 SU1132805A3 SU762309106A SU2309106A SU1132805A3 SU 1132805 A3 SU1132805 A3 SU 1132805A3 SU 762309106 A SU762309106 A SU 762309106A SU 2309106 A SU2309106 A SU 2309106A SU 1132805 A3 SU1132805 A3 SU 1132805A3
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- output
- input
- interpolator
- filter
- significant bits
- Prior art date
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
- G06F7/68—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 pulse rate multipliers or dividers pulse rate multipliers or dividers per se
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M3/00—Conversion of analogue values to or from differential modulation
- H03M3/30—Delta-sigma modulation
- H03M3/50—Digital/analogue converters using delta-sigma modulation as an intermediate step
- H03M3/502—Details of the final digital/analogue conversion following the digital delta-sigma modulation
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
- H03M7/3002—Conversion to or from differential modulation
- H03M7/3004—Digital delta-sigma modulation
- H03M7/3015—Structural details of digital delta-sigma modulators
- H03M7/3031—Structural details of digital delta-sigma modulators characterised by the order of the loop filter, e.g. having a first order loop filter in the feedforward path
- H03M7/3042—Structural details of digital delta-sigma modulators characterised by the order of the loop filter, e.g. having a first order loop filter in the feedforward path the modulator being of the error feedback type, i.e. having loop filter stages in the feedback path only
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
- H03M7/3002—Conversion to or from differential modulation
- H03M7/3004—Digital delta-sigma modulation
- H03M7/3015—Structural details of digital delta-sigma modulators
- H03M7/302—Structural details of digital delta-sigma modulators characterised by the number of quantisers and their type and resolution
- H03M7/3024—Structural details of digital delta-sigma modulators characterised by the number of quantisers and their type and resolution having one quantiser only
- H03M7/3026—Structural details of digital delta-sigma modulators characterised by the number of quantisers and their type and resolution having one quantiser only the quantiser being a multiple bit one
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Computing Systems (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Computational Mathematics (AREA)
- Pure & Applied Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Analogue/Digital Conversion (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Networks Using Active Elements (AREA)
- Oscillators With Electromechanical Resonators (AREA)
Abstract
1444216 Digital - to - analogue conversion STANDARD TELEPHONES & CABLES Ltd 20 Feb 1975 7157/75 Heading H3H An analogue output is derived from a P.C.M. signal by increasing its sampling rate in interpolator 1, converting only the most significant bits to a pulse density signal in a rate-multiplier 3, and low-pass filtering 4 to give the analogue output. Noise is reduced by feeding back the least significant bits through a filter 12. The filter may comprise one or more delays whose outputs are combined with different weighting factors: several examples are described, Figs. 4, 8, 10, 11, not shown. The interpolator may be simply a recirculating register, Fig. 6, not shown, for merely repeating each P.C.M. word, e.g. 32 times or may be a linear interpolator, Fig. 7, not shown. D-to-A converter 3 comprises a synchronous binary counter 5, Fig. 2, fed with fast clock pulses fc, binarily weighted frequencies being obtained at its outputs A, B, C, D which are gated by the 4 most significant bits of the interpolated P.C.M. signal to produce a pulse train E of mean density corresponding to these 4 bits.
Description
Изобретение относится к области ] импульсной техники и может быть применено в системах связи с кодовоимпульсной модуляцией.The invention relates to the field of] pulse technology and can be used in communication systems with code-pulse modulation.
Известен цифроаналоговый преобра-зователь, содержащий прецизионные резисторы, источник опорного напряжения^ ключи и операционный усилитель[1]Known digital-to-analog Converter containing precision resistors, a reference voltage source ^ keys and an operational amplifier [1]
Данный преобразователь сложен в изготовлении; так как для достижения высокой точности требуется индивидуальная подгонка прецизионных резисторов.This converter is difficult to manufacture; since to achieve high accuracy, individual adjustment of precision resistors is required.
Известен также цифро-аналоговый преобразователь, содержащий умножитель частоты, выход которого соединен с входом фильтра низких частот, выход которого соединен с выходной шиной [2] .Also known digital-to-analog Converter containing a frequency multiplier, the output of which is connected to the input of the low-pass filter, the output of which is connected to the output bus [2].
Недостатком данного преобразователя является ограниченная точность, обусловленная погрешностями аналоговых элементов (прецизионных резисторов и ключей), используемых в устройстве. ;The disadvantage of this converter is the limited accuracy due to the errors of the analog elements (precision resistors and keys) used in the device. ;
Цель изобретения - повышение точности преобразования.The purpose of the invention is improving the accuracy of the conversion.
Подставленная цель достигается тем, что в цифроаналоговый; преобразователь, содержащий умножитель час~зо тоты, выход которого соединен с входом фильтра низких частот,' выход которого соединен с выходной шиной, введены блок селекции, сумматор, компаратор, фильтр сигнала ошибки и интерполятор, выход которого подключен к первому входу сумматора, выход которого соединен с входом блока селекции и первым входом компаратора, второй вход которого подключен к выходу блока селекции и входу умножителя частоты, а выход через фильтр сигнала ошибки к второму входу сумматора.The set goal is achieved by the fact that in digital-analog; a converter containing a frequency multiplier whose output is connected to the input of a low-pass filter, the output of which is connected to the output bus, a selection block, an adder, a comparator, an error signal filter, and an interpolator are introduced, the output of which is connected to the first input of the adder, the output of which connected to the input of the selection block and the first input of the comparator, the second input of which is connected to the output of the selection block and the input of the frequency multiplier, and the output through the error signal filter to the second input of the adder.
На чертеже представлена структурная схема устройства.The drawing shows a structural diagram of a device.
Преобразователь содержит последовательно соединенные интерполятор 1, сумматор 2, блок 3 селекции, умножитель 4 частоты, фильтр 5 низкихThe converter contains a series-connected interpolator 1, adder 2, block 3 selection, frequency multiplier 4, filter 5 low
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB715775A GB1444216A (en) | 1975-02-20 | 1975-02-20 | D/a converter for pcm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1132805A3 true SU1132805A3 (en) | 1984-12-30 |
Family
ID=9827708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU762309106A SU1132805A3 (en) | 1975-02-20 | 1976-01-08 | Digital-to-analog converter |
Country Status (19)
| Country | Link |
|---|---|
| JP (1) | JPS51135354A (en) |
| AR (1) | AR212019A1 (en) |
| AT (1) | AT377397B (en) |
| AU (1) | AU497002B2 (en) |
| BE (1) | BE838666A (en) |
| BR (1) | BR7601013A (en) |
| CA (1) | CA1093697A (en) |
| CH (1) | CH607456A5 (en) |
| DE (1) | DE2605724C2 (en) |
| DK (1) | DK148866C (en) |
| ES (1) | ES445387A1 (en) |
| FR (1) | FR2301971A1 (en) |
| GB (1) | GB1444216A (en) |
| IN (1) | IN143625B (en) |
| IT (1) | IT1054867B (en) |
| NL (1) | NL7601414A (en) |
| NO (1) | NO143776C (en) |
| SE (1) | SE410929B (en) |
| SU (1) | SU1132805A3 (en) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5228205A (en) * | 1975-08-28 | 1977-03-03 | Sony Corp | Station selector unit |
| GB1580447A (en) * | 1976-12-01 | 1980-12-03 | Post Office | Code converters |
| NL7801909A (en) * | 1978-02-21 | 1979-08-23 | Philips Nv | DEVICE FOR DECODING A SIGNAL CODED WITH ADAPTIVE DELTA MODULATION. |
| DE3021012C2 (en) * | 1980-06-03 | 1985-08-22 | ANT Nachrichtentechnik GmbH, 7150 Backnang | Generalized interpolative method for the digital-analog conversion of PCM signals |
| US4313173A (en) * | 1980-06-10 | 1982-01-26 | Bell Telephone Laboratories, Incorporated | Linear interpolator |
| GB2107949B (en) * | 1981-10-15 | 1985-04-11 | Standard Telephones Cables Ltd | Digital decoder |
| DE3203012A1 (en) * | 1982-01-29 | 1983-08-04 | Siemens AG, 1000 Berlin und 8000 München | Method and circuit arrangement for generating interpolation values between stored samples |
| US4786923A (en) * | 1982-09-07 | 1988-11-22 | Canon Kabushiki Kaisha | Image recording system for image recording in response to signals entered from a recording information generating unit |
| USRE34660E (en) * | 1983-07-29 | 1994-07-12 | Burr-Brown Corporation | Apparatus and methods for digital-to-analog conversion using modified LSB switching |
| EP0437301A3 (en) * | 1983-07-29 | 1991-09-25 | Burr-Brown Corporation | Apparatus and methods for digital-to-analogue conversion |
| JPS60106229A (en) * | 1983-11-14 | 1985-06-11 | Rohm Co Ltd | D/a converting circuit of digital pwm circuit |
| DE3535021A1 (en) * | 1984-10-02 | 1986-04-17 | Canon K.K., Tokio/Tokyo | DIGITAL / ANALOG CONVERSION DEVICE |
| JPS6184118A (en) * | 1984-10-02 | 1986-04-28 | Canon Inc | Digital-analog converter |
| JPS6184120A (en) * | 1984-10-02 | 1986-04-28 | Canon Inc | Digital-analog converter |
| JPS6184119A (en) * | 1984-10-02 | 1986-04-28 | Canon Inc | Digital-analog converter |
| JPH0824267B2 (en) * | 1984-10-02 | 1996-03-06 | キヤノン株式会社 | Data processing device |
| JPS6184117A (en) * | 1984-10-02 | 1986-04-28 | Canon Inc | Digital-analog converter |
| GB2183115A (en) * | 1985-11-15 | 1987-05-28 | Philips Electronic Associated | Digital to analogue converter |
| DE3709207A1 (en) * | 1987-02-28 | 1988-09-08 | Standard Elektrik Lorenz Ag | CIRCUIT ARRANGEMENT FOR CONVERTING DIGITAL TONE SIGNAL VALUES TO ANALOG TONE |
| GB9103777D0 (en) | 1991-02-22 | 1991-04-10 | B & W Loudspeakers | Analogue and digital convertors |
| GB2319411B (en) * | 1996-11-18 | 2000-11-15 | Fujitsu Ltd | Modem signal transmission and/or reception apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3110894A (en) * | 1959-04-09 | 1963-11-12 | Itt | Digital-to-analog converter |
| US3532864A (en) * | 1967-08-08 | 1970-10-06 | United Aircraft Corp | Linear interpolation function generation |
-
1975
- 1975-02-20 GB GB715775A patent/GB1444216A/en not_active Expired
- 1975-12-18 IN IN2355/CAL/75A patent/IN143625B/en unknown
-
1976
- 1976-01-08 SU SU762309106A patent/SU1132805A3/en active
- 1976-02-10 AR AR262202A patent/AR212019A1/en active
- 1976-02-11 NO NO760428A patent/NO143776C/en unknown
- 1976-02-12 NL NL7601414A patent/NL7601414A/en not_active Application Discontinuation
- 1976-02-13 AU AU11100/76A patent/AU497002B2/en not_active Expired
- 1976-02-13 DE DE2605724A patent/DE2605724C2/en not_active Expired
- 1976-02-16 SE SE7601666A patent/SE410929B/en not_active IP Right Cessation
- 1976-02-17 IT IT20224/76A patent/IT1054867B/en active
- 1976-02-18 BE BE2054833A patent/BE838666A/en not_active IP Right Cessation
- 1976-02-18 DK DK64976A patent/DK148866C/en not_active IP Right Cessation
- 1976-02-18 BR BR7601013A patent/BR7601013A/en unknown
- 1976-02-19 CH CH201976A patent/CH607456A5/xx not_active IP Right Cessation
- 1976-02-19 CA CA246,085A patent/CA1093697A/en not_active Expired
- 1976-02-20 JP JP51017156A patent/JPS51135354A/en active Granted
- 1976-02-20 FR FR7604733A patent/FR2301971A1/en active Granted
- 1976-02-20 AT AT0121476A patent/AT377397B/en not_active IP Right Cessation
- 1976-02-20 ES ES445387A patent/ES445387A1/en not_active Expired
Non-Patent Citations (1)
| Title |
|---|
| 1. Патент US 3810157, кл. 340-347 ОА, Н 03 К 13/02,07.05.74. 2. Electronic Deeigh, 1968, I том. 16, W 22, с. 75, рис. 27 (про тот п). * |
Also Published As
| Publication number | Publication date |
|---|---|
| CH607456A5 (en) | 1978-12-29 |
| SE410929B (en) | 1979-11-12 |
| AT377397B (en) | 1985-03-11 |
| DE2605724A1 (en) | 1976-09-02 |
| NO143776C (en) | 1981-04-08 |
| IT1054867B (en) | 1981-11-30 |
| ATA121476A (en) | 1984-07-15 |
| ES445387A1 (en) | 1977-06-16 |
| NO143776B (en) | 1980-12-29 |
| BE838666A (en) | 1976-08-18 |
| AU1110076A (en) | 1977-08-18 |
| AU497002B2 (en) | 1978-11-16 |
| SE7601666L (en) | 1976-08-23 |
| FR2301971A1 (en) | 1976-09-17 |
| FR2301971B1 (en) | 1982-07-23 |
| GB1444216A (en) | 1976-07-28 |
| DK148866B (en) | 1985-10-28 |
| DK148866C (en) | 1986-04-21 |
| DK64976A (en) | 1976-08-21 |
| BR7601013A (en) | 1976-09-14 |
| AR212019A1 (en) | 1978-04-28 |
| DE2605724C2 (en) | 1986-01-23 |
| JPS51135354A (en) | 1976-11-24 |
| NL7601414A (en) | 1976-08-24 |
| CA1093697A (en) | 1981-01-13 |
| JPS5542774B2 (en) | 1980-11-01 |
| IN143625B (en) | 1978-01-07 |
| NO760428L (en) | 1976-08-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| SU1132805A3 (en) | Digital-to-analog converter | |
| US4509037A (en) | Enhanced delta modulation encoder | |
| US4890106A (en) | Apparatus and methods for digital-to-analog conversion using modified LSB switching | |
| US4345241A (en) | Analog-to-digital conversion method and apparatus | |
| EP0152922A3 (en) | Method and system for processing digital video signal incorporating phase-correction feature | |
| US4542371A (en) | Method of converting a digital signal into an analog signal and a converter therefor | |
| US4929947A (en) | Constant width pulse distribution in a digital to analog converter for serial digital data | |
| US4144577A (en) | Integrated quantized signal smoothing processor | |
| JP3326619B2 (en) | PWM circuit | |
| RU2771066C1 (en) | Multi-channel analog-to-digital converter | |
| USRE34660E (en) | Apparatus and methods for digital-to-analog conversion using modified LSB switching | |
| GB1463806A (en) | Radar systems including digital processing arrangements | |
| SU1005321A2 (en) | Device for measuring noise level in speech pauses | |
| SU1356184A1 (en) | Balanced modulator | |
| JP3230227B2 (en) | A / D converter | |
| SU1555806A1 (en) | Shaper of recurrent frequency-modulated signals | |
| SU1130881A1 (en) | Device for reproducing periodic signals | |
| SU1309055A1 (en) | Device for simulating short-circuit signal | |
| SU1109859A1 (en) | Two-channel harmonic oscillator | |
| SU599335A1 (en) | Digital double-phase sine-shaped signal generator | |
| SU1672570A1 (en) | Delta-sigma encoder | |
| SU1667038A1 (en) | Special signal generator | |
| SU1142848A1 (en) | Interpolator | |
| SU1316091A1 (en) | Device for encoding analog signals | |
| SU1417189A1 (en) | Follow-up a-d converter |