GB1395720A - Digital multiplying circuits - Google Patents
Digital multiplying circuitsInfo
- Publication number
- GB1395720A GB1395720A GB4480271A GB4480271A GB1395720A GB 1395720 A GB1395720 A GB 1395720A GB 4480271 A GB4480271 A GB 4480271A GB 4480271 A GB4480271 A GB 4480271A GB 1395720 A GB1395720 A GB 1395720A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- counter
- pulses
- frequencies
- count
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computational Mathematics (AREA)
- Computing Systems (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
Abstract
1395720 Counting apparatus W & T AVERY Ltd 25 Sept 1972 [25 Sept 1971] 44802/71 Headings G4D and G4A Counting apparatus is arranged to form the value f 1 f 4 /f 2 f 3 from four input frequencies f 1 -f 4 . A counter 10 is first arranged to count up pulses at frequency f 1 for a set number of periods of the frequency f 2 . The counter 10 is then arranged to count back to zero with pulses at frequency f 3 and during the time that it is so counting a further counter 14 receives pulses at a frequency f 4 . By arranging that two of the frequencies are fixed and the other two are equal and dependent upon the output of a transducer, the output of a transducer operating to a square law can be rendered linear. In a modification (Fig. 2, not shown) a first frequency f a is counted for a period of f 2 and then a second frequency f b is counted for the same period (so that f 1 = f a + f b ); the gate G4 receives the difference between the first and second frequencies (so that f 4 = f a -f b ); and f 2 , f 3 are constant. By this arrangement the count accumulated in the counter 14 will be proportional to f a <SP>2</SP> + f b <SP>2</SP>- In a further arrangement (Fig. 3, not shown) using two counters 10 the function (f a <SP>2</SP> + f b <SP>2</SP>)<SP>-1</SP> is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4480271A GB1395720A (en) | 1971-09-25 | 1971-09-25 | Digital multiplying circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4480271A GB1395720A (en) | 1971-09-25 | 1971-09-25 | Digital multiplying circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1395720A true GB1395720A (en) | 1975-05-29 |
Family
ID=10434816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4480271A Expired GB1395720A (en) | 1971-09-25 | 1971-09-25 | Digital multiplying circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1395720A (en) |
-
1971
- 1971-09-25 GB GB4480271A patent/GB1395720A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |