GB1444649A - Voltage to duty ratio converter and multiplying and dividing circuits - Google Patents
Voltage to duty ratio converter and multiplying and dividing circuitsInfo
- Publication number
- GB1444649A GB1444649A GB3818174A GB3818174A GB1444649A GB 1444649 A GB1444649 A GB 1444649A GB 3818174 A GB3818174 A GB 3818174A GB 3818174 A GB3818174 A GB 3818174A GB 1444649 A GB1444649 A GB 1444649A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- amplifier
- transistor
- duty ratio
- resistors
- 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)
- Amplifiers (AREA)
- Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)
- Semiconductor Lasers (AREA)
Abstract
1444649 Electric analogue multiplication and division HONEYWELL Inc 2 Sept 1974 [31 Aug 1973] 38181/74 Heading G4G An electric analogue calculating circuit for generating a function of the form A.B/C comprises an amplifier 6 which controls a switch 16 in dependence on its output to connect the junction of resistors 10 and 12 to either earth or a voltage V20 from source 20, the resistors being connected to inputs of the amplifier 6 as shown. It is explained that the voltage applied to the base of a transistor 24 is a pulse train of duty ratio E IN /V 20 , where E IN is the voltage applied to an input resistor 4. The transistor 24 switches on and off a LED 28 optically coupled to a photosensitive transistor 30 and hence to an amplifier 36 which switches resistor 52 between earth and a voltage V 48 from source 48 and V BB , the smoothing circuit 52, 56 giving a mean voltage at E OUT =- E IN .V 48 /V 20 relative to V BB , and hence by making V 20 and V 48 represent variables B, C and E IN represent A the desired function is obtained. In Fig. 2 (not shown) the switching is performed by f.e.t.'s and the sources of V 20 and V 48 are constant voltage circuits. Fig. 3 (not shown) is similar to Fig. 2 but has electrical coupling replacing the optical coupling.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US39357273A | 1973-08-31 | 1973-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1444649A true GB1444649A (en) | 1976-08-04 |
Family
ID=23555288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3818174A Expired GB1444649A (en) | 1973-08-31 | 1974-09-02 | Voltage to duty ratio converter and multiplying and dividing circuits |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5837593B2 (en) |
| CA (1) | CA1051555A (en) |
| DE (1) | DE2439605C2 (en) |
| FR (1) | FR2242818B1 (en) |
| GB (1) | GB1444649A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3900179A1 (en) * | 1989-01-05 | 1990-07-12 | Hartmann & Braun Ag | Circuit arrangement for converting a direct voltage into digital data |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1102539A (en) * | 1965-12-23 | 1968-02-07 | Kent Ltd G | Improvements in or relating to electric signal integrating apparatus |
| US3599203A (en) * | 1969-07-30 | 1971-08-10 | Gen Electric | Asynchronous analog to logic level signal converter |
-
1974
- 1974-07-12 CA CA204,701A patent/CA1051555A/en not_active Expired
- 1974-08-17 DE DE19742439605 patent/DE2439605C2/en not_active Expired
- 1974-08-30 FR FR7429737A patent/FR2242818B1/fr not_active Expired
- 1974-08-31 JP JP10049974A patent/JPS5837593B2/en not_active Expired
- 1974-09-02 GB GB3818174A patent/GB1444649A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2439605C2 (en) | 1986-01-02 |
| FR2242818A1 (en) | 1975-03-28 |
| JPS5056137A (en) | 1975-05-16 |
| FR2242818B1 (en) | 1978-09-15 |
| CA1051555A (en) | 1979-03-27 |
| DE2439605A1 (en) | 1975-03-13 |
| JPS5837593B2 (en) | 1983-08-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PE20 | Patent expired after termination of 20 years |
Effective date: 19940901 |