GB1408018A - Electronic multiplier and or divider - Google Patents
Electronic multiplier and or dividerInfo
- Publication number
- GB1408018A GB1408018A GB5975172A GB5975172A GB1408018A GB 1408018 A GB1408018 A GB 1408018A GB 5975172 A GB5975172 A GB 5975172A GB 5975172 A GB5975172 A GB 5975172A GB 1408018 A GB1408018 A GB 1408018A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- modulated
- circuit
- produce
- error signal
- 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
- G06G—ANALOGUE COMPUTERS
- G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
- G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
- G06G7/16—Arrangements for performing computing operations, e.g. operational amplifiers for multiplication or division
- G06G7/161—Arrangements for performing computing operations, e.g. operational amplifiers for multiplication or division with pulse modulation, e.g. modulation of amplitude, width, frequency, phase or form
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Power Engineering (AREA)
- Software Systems (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Feedback Control In General (AREA)
- Amplifiers (AREA)
- Amplitude Modulation (AREA)
Abstract
1408018 Divider-multiplier computers MONSANTO CO 28 Dec 1972 [29 Dec 1971] 59751-/72 Heading G4G A divider/multiplier circuit includes a loop in which an error signal is represented as the duty cycle of a pulse train subsequently modulated in accordance with a divisor signal (b), the modulated error signal being compared with an input dividend signal (a), whereby the error signal is representative of the quotient (a/b). As shown, input signal a and feedback signal V f are compared in op. amp. 12 to produce error signal e which, after integration in circuit 14, is compared with a triangular wave 21 to produce a pulse train 22 having a duty cycle d proportional to the error signal. Pulse train 22 is modulated in FET 96 by a second input signal b and the modulated signal converted in low-pass integrating circuit 26 to an analogue signal V f = k 1 db. Thus, by the operation of comparator 12, The signal 22 which represents a/b may be modulated in FET 30 in accordance with a further input variable c. The resultant signal is demodulated in circuit 32 to produce an analogue signal proportional to c.a/b. The scale factor may be varied by means of potentiometer 124 and the signal amplified in circuit 34 to produce optional current or voltage outputs.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US21348271A | 1971-12-29 | 1971-12-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1408018A true GB1408018A (en) | 1975-10-01 |
Family
ID=22795285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5975172A Expired GB1408018A (en) | 1971-12-29 | 1972-12-28 | Electronic multiplier and or divider |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3737640A (en) |
| JP (1) | JPS4874947A (en) |
| CA (1) | CA999083A (en) |
| DE (1) | DE2263831A1 (en) |
| FR (1) | FR2166150B1 (en) |
| GB (1) | GB1408018A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2526367A1 (en) * | 1975-06-12 | 1976-12-23 | Bbc Brown Boveri & Cie | PROCEDURE FOR MULTIPLICATION / DIVISION OF ANALOG VOLTAGES |
| US4616332A (en) * | 1982-09-24 | 1986-10-07 | The Foxboro Company | Apparatus for converting analog-format signals to pulse-format signals |
| JPS6423607A (en) * | 1987-07-17 | 1989-01-26 | Otis Elevator Japan | Multiphase multiplier circuit |
| US5087894A (en) * | 1987-11-13 | 1992-02-11 | Analog Devices, Inc. | Monolithic interface circuit for linear variable differential transformers |
| US4904921A (en) * | 1987-11-13 | 1990-02-27 | Analog Devices, Inc. | Monolithic interface circuit for linear variable differential transformers |
| US5327030A (en) * | 1987-11-13 | 1994-07-05 | Analog Devices, Inc. | Decoder and monolithic integrated circuit incorporating same |
| US6931331B2 (en) * | 2003-10-30 | 2005-08-16 | Agilent Technologies, Inc. | Measurement interface optimized for both differential and single-ended inputs |
| TW200814532A (en) * | 2006-09-07 | 2008-03-16 | Richtek Techohnology Corp | Device and method of generating PWM signals, power converter and power conversion method utilizing the same |
| US9307262B2 (en) * | 2011-01-13 | 2016-04-05 | Texas Instruments Incorporated | Methods and systems for facilitating multimedia data encoding utilizing configured buffer information |
| IT201800002702A1 (en) * | 2018-02-15 | 2019-08-15 | St Microelectronics Srl | MULTIPLIER CIRCUIT, CORRESPONDING DEVICE AND PROCEDURE |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE539504A (en) * | 1955-07-02 | |||
| US3445643A (en) * | 1966-09-22 | 1969-05-20 | Fischer & Porter Co | Electronic multiplier/divider for fluid flow systems |
| US3466460A (en) * | 1967-01-20 | 1969-09-09 | Weston Instruments Inc | Time division multiplier |
| US3492471A (en) * | 1967-10-16 | 1970-01-27 | Honeywell Inc | Time division multiplier |
| GB1269046A (en) * | 1968-05-01 | 1972-03-29 | Emi Ltd | Improvements relating to multiplying circuit arrangements |
| US3569688A (en) * | 1968-12-24 | 1971-03-09 | Audn Corp | A multiplier in which a capacitor is charged at a rate proportional to the product of two analogue inputs |
| US3572115A (en) * | 1969-08-12 | 1971-03-23 | Conrac Corp | Altitude rate transducer and computing circuit |
-
1971
- 1971-12-29 US US00213482A patent/US3737640A/en not_active Expired - Lifetime
-
1972
- 1972-12-28 FR FR7246718A patent/FR2166150B1/fr not_active Expired
- 1972-12-28 DE DE2263831A patent/DE2263831A1/en active Pending
- 1972-12-28 CA CA160,022A patent/CA999083A/en not_active Expired
- 1972-12-28 JP JP48004051A patent/JPS4874947A/ja active Pending
- 1972-12-28 GB GB5975172A patent/GB1408018A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2166150A1 (en) | 1973-08-10 |
| DE2263831A1 (en) | 1973-07-05 |
| CA999083A (en) | 1976-10-26 |
| JPS4874947A (en) | 1973-10-09 |
| US3737640A (en) | 1973-06-05 |
| FR2166150B1 (en) | 1977-04-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |