GB1108154A - Improvements relating to frequency control circuits - Google Patents
Improvements relating to frequency control circuitsInfo
- Publication number
- GB1108154A GB1108154A GB18849/64A GB1884964A GB1108154A GB 1108154 A GB1108154 A GB 1108154A GB 18849/64 A GB18849/64 A GB 18849/64A GB 1884964 A GB1884964 A GB 1884964A GB 1108154 A GB1108154 A GB 1108154A
- Authority
- GB
- United Kingdom
- Prior art keywords
- counter
- pulses
- counters
- circuit
- output
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B21/00—Generation of oscillations by combining unmodulated signals of different frequencies
- H03B21/01—Generation of oscillations by combining unmodulated signals of different frequencies by beating unmodulated signals of different frequencies
- H03B21/02—Generation of oscillations by combining unmodulated signals of different frequencies by beating unmodulated signals of different frequencies by plural beating, i.e. for frequency synthesis ; Beating in combination with multiplication or division of frequency
- H03B21/025—Generation of oscillations by combining unmodulated signals of different frequencies by beating unmodulated signals of different frequencies by plural beating, i.e. for frequency synthesis ; Beating in combination with multiplication or division of frequency by repeated mixing in combination with division of frequency only
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/60—Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers
- G06F7/68—Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers using pulse rate multipliers or dividers pulse rate multipliers or dividers per se
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/22—Controlling the speed digitally using a reference oscillator, a speed proportional pulse rate feedback and a digital comparator
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K21/00—Details of pulse counters or frequency dividers
Landscapes
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mathematical Optimization (AREA)
- Mathematical Analysis (AREA)
- Computing Systems (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Computational Mathematics (AREA)
- Power Engineering (AREA)
- Control Of Multiple Motors (AREA)
- Control Of Stepping Motors (AREA)
Abstract
1,108,154. Electronic counters. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. 18 June, 1965 [6 May, 1964], No. 18849/64. Heading G4A. [Also in Division G3] According to the number stored in a first counter B5-B8, so a proportion of the pulses applied to a second counter B1-B4 are passed to an output terminal. Both counters are of binary-coded decimal type with different feedback arrangements, whereby the first is weighted 1224 and the second 1125. Carry between binary stages is effected over Q terminals and pulse outputs to AND gates A1-A4 is effected over P terminals, the counters being arranged for this purpose in opposite sense. The circuit shown represents the first decimal place but provision may be made by carry from B4 and B8 for subsequent decimal places. The first or controlling counter may be reversible (Fig. 13, not shown) as described in Specification 1,108,153. The apparatus may be used in a retro-active system, Fig. 14, to maintain the speed of a motor M at a specified rate. Feed-back loop 3 provides a first degree of control. A finer control is provided by pulse generator 4, the output of which over a 1- second period is stored in control counter 5211. This then controls the output of an oscillator and main counter 1224 to feed pulses to circuit 5 which also receives pulses from generator 4. In the manner described in Specification 1,098,457, the circuit 5 deletes coincident or corresponding pulses so as to drive counter 9 forwards or backwards. A digital-to-analogue converter 10 and amplifier 2 then complete the loop to speed or slow the motor as necessary.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB18849/64A GB1108154A (en) | 1964-05-06 | 1964-05-06 | Improvements relating to frequency control circuits |
FR16015A FR1433097A (en) | 1964-05-06 | 1965-05-06 | Improvements in frequency control circuits |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB18849/64A GB1108154A (en) | 1964-05-06 | 1964-05-06 | Improvements relating to frequency control circuits |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1108154A true GB1108154A (en) | 1968-04-03 |
Family
ID=10119454
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18849/64A Expired GB1108154A (en) | 1964-05-06 | 1964-05-06 | Improvements relating to frequency control circuits |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1108154A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0068713A2 (en) * | 1981-06-15 | 1983-01-05 | Matsushita Electric Industrial Co., Ltd. | Sewing machine having a digital command circuit |
-
1964
- 1964-05-06 GB GB18849/64A patent/GB1108154A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0068713A2 (en) * | 1981-06-15 | 1983-01-05 | Matsushita Electric Industrial Co., Ltd. | Sewing machine having a digital command circuit |
EP0068713A3 (en) * | 1981-06-15 | 1983-05-04 | Matsushita Electric Industrial Co., Ltd. | Sewing machine having a digital command circuit |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB821750A (en) | Improvements in or relating to electric control switching systems for controlling the supply of power to a load | |
GB1324339A (en) | Direct current control circuit | |
ES402039A1 (en) | Digital slip frequency control circuit for asynchronous dynamo electric machines | |
GB1189339A (en) | Improved Digital-Analog Control System Employing Solid State Digital Potentiometer | |
GB1436652A (en) | Modulation apparatus of semiconductor laser device | |
US3393366A (en) | High precision motor speed control circuit utilizing binary counters and digital logic | |
GB1535560A (en) | Automatic control circuitry | |
GB1108154A (en) | Improvements relating to frequency control circuits | |
ES373579A1 (en) | Constant volts-per-hertz regulating system | |
GB1129267A (en) | Method and apparatus for controlling the frequency of a variable frequency oscillator | |
GB1107151A (en) | Improvements in or relating to control systems for electric motors | |
GB1010609A (en) | Pulse generators | |
GB1205240A (en) | Improvements in and relating to electrical circuit arrangements | |
GB1284032A (en) | Improvements in voltage regulator for direct current motor with drive current control | |
GB1419011A (en) | Control set for a current converter | |
GB1380932A (en) | Function generators | |
GB1101816A (en) | Absorption refrigeration systems | |
GB1142356A (en) | Voltage-to-frequency transducers | |
GB1224069A (en) | Electric circuit arrangement for producing a three-phase or polyphase alternating-current system | |
GB1058742A (en) | An electrical code modulation system | |
GB1073035A (en) | Improvements in or relating to electric modulating and compandor circuit arrangements | |
GB1104101A (en) | Improvements in or relating to apparatus for controlling the path of a device carried by a moving vehicle | |
GB1033896A (en) | Apparatus for generating a parabolic reference voltage | |
GB1354819A (en) | Exposure time control circuit for a camera | |
GB981564A (en) | Improvements in or relating to devices for the electrical control of the components of mixtures |