GB983823A - Electric analog multiplier - Google Patents
Electric analog multiplierInfo
- Publication number
- GB983823A GB983823A GB19774/63A GB1977463A GB983823A GB 983823 A GB983823 A GB 983823A GB 19774/63 A GB19774/63 A GB 19774/63A GB 1977463 A GB1977463 A GB 1977463A GB 983823 A GB983823 A GB 983823A
- Authority
- GB
- United Kingdom
- Prior art keywords
- terminal
- resistance
- input
- output
- circuit
- 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
- G06G7/163—Arrangements for performing computing operations, e.g. operational amplifiers for multiplication or division using a variable impedance controlled by one of the input signals, variable amplification or transfer function
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)
- Lasers (AREA)
- Amplifiers (AREA)
Abstract
983, 823. Electric analogue calculating. ROBERTSHAW CONTROLS CO. May 17, 1963 [June 15, 1962], No. 19774/63. Heading G4G. An analogue multiplier comprises a voltage dividing network connected between an input terminal (to which a potential representing one variable is applied) and a reference terminal and having an intermediate output terminal, at least part of the network consisting of a radiant energy responsive variable impedance device disposed so as to receive radiant energy from a source, and a circuit whereby the intensity of radiant energy by the source may be varied in accordance with the value of another variable to be multiplied, whereby the potential on the output terminal represents a multiplicative function of the variables. In Fig. 1 a voltage divider comprising a fixed resistance R1 and a photosensitive resistance Rp is supplied with a square wave derived from R. F. generator 22 and clipper circuit 24. The junction 12 of the two resistances is coupled via capacitor C1 to a rectifying and integrating circuit and to an input terminal 40 of a D.C. amplifier 30. The other input terminal 42 of amplifier 30 is at a potential proportional to one of the input variables supplied at terminal 48, and the output of amplifier 30 controls the intensity of a neon bulb 60 which illuminates the resistance Rp. This circuit is self-adjusting so that the ratio of the voltage divider is made proportional to the input variable supplied at terminal 48. The second input variable is supplied at terminal 68 and the output, proportional to the product of the two inputs, is taken from terminal 64. Terminals 68 and 64 are coupled to the voltage divider through low pass filters which prevent the square wave from interfering with the input and output signals. In an alternative circuit, Fig. 2 (not shown), resistance R1 is replaced by a photosensitive resistance illuminated by a second neon bulb controlled by the output of amplifier 30 through an inverter so that its resistance changes in the opposite sense to the change in resistance of Rp.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US202746A US3283135A (en) | 1962-06-15 | 1962-06-15 | Analog multiplier using radiation responsive impedance means in its feedback arrangement |
Publications (1)
Publication Number | Publication Date |
---|---|
GB983823A true GB983823A (en) | 1965-02-17 |
Family
ID=22751092
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB19774/63A Expired GB983823A (en) | 1962-06-15 | 1963-05-17 | Electric analog multiplier |
Country Status (2)
Country | Link |
---|---|
US (1) | US3283135A (en) |
GB (1) | GB983823A (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE661559A (en) * | 1964-03-25 | |||
US3384739A (en) * | 1964-09-23 | 1968-05-21 | Massachusetts Inst Technology | Analog multiplier |
FR1500939A (en) * | 1966-08-04 | 1967-11-10 | Bailey Controle | Elementary analog calculation device and function generator such as a multiplier using this device |
US3534280A (en) * | 1966-12-30 | 1970-10-13 | Texas Instruments Inc | Opto thermal audio amplifier |
US3495080A (en) * | 1967-10-24 | 1970-02-10 | Us Navy | High speed analog multiplier using photocells in conjunction with neon and argon tubes |
US3535547A (en) * | 1967-12-19 | 1970-10-20 | Nasa | Operational integrator |
US3896301A (en) * | 1974-01-11 | 1975-07-22 | Bendix Corp | Solid state dc times ac multiplier |
US3916346A (en) * | 1974-12-05 | 1975-10-28 | Rca Corp | Modulator |
DE2537560A1 (en) * | 1975-08-22 | 1977-03-03 | Sartorius Werke Gmbh | PROCEDURE AND CIRCUIT ARRANGEMENT FOR THE PROCESSING OF DC SIGNALS WITH ELECTRIC TRANSDUCERS, IN PARTICULAR ELECTROMECHANICAL PRECISION AND FINE SCALES |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3014135A (en) * | 1957-03-04 | 1961-12-19 | Hewlett Packard Co | Direct current amplifier and modulator therefor |
US3110813A (en) * | 1957-07-09 | 1963-11-12 | Westinghouse Electric Corp | Solid state photosensitive control element |
US3014134A (en) * | 1957-10-30 | 1961-12-19 | North American Aviation Inc | Control for intensity of illumination |
US3040241A (en) * | 1958-04-02 | 1962-06-19 | Hewlett Packard Co | Voltage regulator and method |
US3082381A (en) * | 1959-05-27 | 1963-03-19 | Goodyear Aircraft Corp | Automatic gain control circuit |
US3070306A (en) * | 1959-09-11 | 1962-12-25 | Gen Precision Inc | Multiplying circuit |
US3087120A (en) * | 1959-10-20 | 1963-04-23 | Seismograph Service Corp | Automatic volume control circuit |
US3058662A (en) * | 1960-02-29 | 1962-10-16 | Standard Oil Co | Electric analog multiplier |
US3159787A (en) * | 1960-03-21 | 1964-12-01 | Electro Instr Inc | R. m. s. meter using amplifier with controlled feedback |
US3167647A (en) * | 1961-08-15 | 1965-01-26 | Honeywell Inc | Electrical analog computing circuit with square root extraction capability |
US3211900A (en) * | 1961-11-01 | 1965-10-12 | Gen Electric | Analog multiplier circuits using an electroluminescent element |
US3202905A (en) * | 1962-01-02 | 1965-08-24 | Straza Ind | Remotely controlled attenuator devices |
-
1962
- 1962-06-15 US US202746A patent/US3283135A/en not_active Expired - Lifetime
-
1963
- 1963-05-17 GB GB19774/63A patent/GB983823A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3283135A (en) | 1966-11-01 |
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