GB918679A - Improvements in or relating to control circuitry - Google Patents
Improvements in or relating to control circuitryInfo
- Publication number
- GB918679A GB918679A GB9605/59A GB960559A GB918679A GB 918679 A GB918679 A GB 918679A GB 9605/59 A GB9605/59 A GB 9605/59A GB 960559 A GB960559 A GB 960559A GB 918679 A GB918679 A GB 918679A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- resistor
- series
- circuit
- march
- 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
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/26—Automatic controllers electric in which the output signal is a pulse-train
- G05B11/28—Automatic controllers electric in which the output signal is a pulse-train using pulse-height modulation; using pulse-width modulation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Dc-Dc Converters (AREA)
- Generation Of Surge Voltage And Current (AREA)
Abstract
918,679. Transistor pulse circuits. MINNEAPOLIS-HONEYWELL REGULATOR CO, March 19, 1959 [March 25, 1958], No. 9605/59. Class 40 (6). [Also in Group XXXV] A circuit for delivering a pulse width modulated output proportional to an input signal comprises a cyclically varying D.C. source 33, 43, 45 charging a capacitor 25 connected in parallel with the collector 13 and emitter 12 electrodes of a transistor 10 and in series with the base 17 and emitter electrodes 16 of a transistor 11 which maintains the charging current constant. The input signal connected to transistor 10 varies its conductivity, hence varies the voltage across the capacitor 25, thus determining the time in each half-cycle during which a series resistor 46 carries current. The potential across resistor 46 fires a transistor 54 which is connected in a bi-stable circuit with another transistor 67, which switches a power transistor 86 connected in series with a load R L supplied from D.C. terminals 51, 52. The sensitivity of the circuit may be increased by removing the resistor 46 and shunting a resistor 61. A list of typical component values is given in the Specification.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US1132189XA | 1958-03-25 | 1958-03-25 | |
| US723768A US2947950A (en) | 1958-03-25 | 1958-03-25 | Semiconductor pulse width modulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB918679A true GB918679A (en) | 1963-02-13 |
Family
ID=26810813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9605/59A Expired GB918679A (en) | 1958-03-25 | 1959-03-19 | Improvements in or relating to control circuitry |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1132189B (en) |
| GB (1) | GB918679A (en) |
-
1959
- 1959-03-19 GB GB9605/59A patent/GB918679A/en not_active Expired
- 1959-03-25 DE DEM40955A patent/DE1132189B/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE1132189B (en) | 1962-06-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3069552A (en) | Timing circuit | |
| GB1357573A (en) | Corrosion rate meter | |
| GB1513443A (en) | Apparatus for charging a sealed storage cell battery at a low temperature | |
| GB1067734A (en) | Improvements in digital voltmeters | |
| ES8702006A1 (en) | Circuit for monitoring the electric current supply of a consumer. | |
| GB934698A (en) | Improvements in electronic computers | |
| GB813307A (en) | Transistor integrating circuits | |
| GB1404549A (en) | Voltage regulator | |
| GB918679A (en) | Improvements in or relating to control circuitry | |
| US3209175A (en) | Transistor-relay pulse generator | |
| GB1123485A (en) | Superregenerative null detector | |
| MY100773A (en) | Frequency to current converter circuit. | |
| JPS52102659A (en) | Differential amplifier | |
| SU371685A1 (en) | AC KEY | |
| FR2377089A1 (en) | AC circuit breaker test unit - has auxiliary voltage source coupled to FET control device | |
| GB893405A (en) | Improvements in electronic analogue computer circuits | |
| SU404175A1 (en) | AMPLIFIER | |
| GB1002776A (en) | Voltage integrator circuit | |
| GB974105A (en) | Improvements relating to transistor amplifier circuit arrangements | |
| SU438938A1 (en) | DC booster device with periodic zero adjustment | |
| JPS5451757A (en) | Signal generator | |
| GB931864A (en) | Improvements in or relating to electronic limiter circuits | |
| GB917640A (en) | Improvements in or relating to electric circuits employing transistors | |
| GB859320A (en) | Improvements in or relating to pulse generating circuits | |
| JPS5521605A (en) | Constant current switching circuit |