GB901084A - Improvements in or relating to phase-discriminating transistor circuitry - Google Patents
Improvements in or relating to phase-discriminating transistor circuitryInfo
- Publication number
- GB901084A GB901084A GB26018/58A GB2601858A GB901084A GB 901084 A GB901084 A GB 901084A GB 26018/58 A GB26018/58 A GB 26018/58A GB 2601858 A GB2601858 A GB 2601858A GB 901084 A GB901084 A GB 901084A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- bridge
- phase
- resistors
- load
- 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
- G05B11/32—Automatic controllers electric with inputs from more than one sensing element; with outputs to more than one correcting element
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
- G05D23/1909—Control of temperature characterised by the use of electric means using an analogue comparing device whose output amplitude can only take two discrete values
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
901,084. Phase-sensitive circuits. MINNEAPOLIS-HONEYWELL REGULATOR CO. Aug. 13, 1958 [Aug. 14, 1957], No. 26018/58. Class 38 (4). In a phase-sensitive circuit for selectively energizing relays 124, 154 in accordance with the sense of unbalance of a temperature or humidity measuring A.C. bridge (not shown), a centre-tapped transformer 27 and rectifiers 42, 43 supply load resistors 70, 71 on alternate halfcycles, and a transistor 23 in series with the common return is biased by the amplified output of the bridge so as to increase and decrease, respectively, the load currents through resistors 70, 71 according to the phase relationship between the bridge output and the reference supply to transformer 27. Transistor 23 is direct-coupled to the amplifier transistor 15 which has an input from the bridge at 10, 11 and is biased by a constant current source 90. There is D.C. negative feed-back from across the load resistors 70, 71 via resistors 75, 76 to stabilize the collector currents of the transistor against the effects of temperature changes or ageing. The output voltage across the load resistors operates the relays 124 or 154 through transistor switching circuits 96, 100 and 107, 113.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US678138A US2911545A (en) | 1957-08-14 | 1957-08-14 | Semiconductor apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB901084A true GB901084A (en) | 1962-07-11 |
Family
ID=24721543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB26018/58A Expired GB901084A (en) | 1957-08-14 | 1958-08-13 | Improvements in or relating to phase-discriminating transistor circuitry |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB901084A (en) |
| NL (1) | NL110820C (en) |
-
1958
- 1958-08-13 GB GB26018/58A patent/GB901084A/en not_active Expired
- 1958-08-14 NL NL110820D patent/NL110820C/xx active
Also Published As
| Publication number | Publication date |
|---|---|
| NL110820C (en) | 1964-10-15 |
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