GB1244239A - High speed reciprocal and quotient computing apparatus - Google Patents
High speed reciprocal and quotient computing apparatusInfo
- Publication number
- GB1244239A GB1244239A GB5838969A GB5838969A GB1244239A GB 1244239 A GB1244239 A GB 1244239A GB 5838969 A GB5838969 A GB 5838969A GB 5838969 A GB5838969 A GB 5838969A GB 1244239 A GB1244239 A GB 1244239A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gates
- accumulator
- register
- flop
- coupled
- 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
- G06F7/62—Performing operations exclusively by counting total number of pulses ; Multiplication, division or derived operations using combined denominational and incremental processing by counters, i.e. without column shift
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)
- Complex Calculations (AREA)
Abstract
1,244,239. Divider. TIME SYSTEMS CORP. 28 Nov., 1969 [29 Nov., 1968], No. 58389/69. Heading G4A. The invention relates to dividers particularly to dividers for obtaining a digital frequency value from a period. A period register 20 having a plurality of Decade Counter Units DCU contains a number representing a period. A transfer unit 30 enabled by pulses from a control Decade Unit passes the contents of the register 20 to a transfer unit 60 containing two sets of gates 1 S -8 S , 4 R -11 R . Each element of the transfer unit is coupled to a gate in each set and the gates are coupled to an accumulator 40 with gates 1 S -8 S coupled to stages A 1 -A 8 respectively and gates 4 R -11 R coupled to stages A 4 -A 11 respectively. The gates 1 S -8 S are enabled by the set output of a flip-flop 80 and the gates 4 R -11 R are enabled by the reset output. Initially flip-flop 80 is reset so that the contents of register 20 are transferred to the accumulator effectively multiplied by 1000. Nines detectors coupled to stages A 12 -A 14 of the accumulator feed an AND gate arranged to set flip-flop 8 when the most significant three digits of the accumulator are each nine. The set flip-flop causes the contents of register 20 to be transferred normally. The flip-flop also controls AND gates 90 R , 90 s causing a pulse indicating that the contents of the register 20 have been transferred to enter either stages F 1 or F 4 of the frequency register counter so that the counter is incremented by 1 or 1000. When the accumulator is full and overflows the Control Decade Unit is stopped, and the counter contains the required quotient. The apparatus may also be used to divide by presetting the accumulator to a number such that the accumulator would overflow if the dividend was added to it, entering the divisor in the period register 20 and performing the division operation as described above.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US77998568A | 1968-11-29 | 1968-11-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1244239A true GB1244239A (en) | 1971-08-25 |
Family
ID=25118207
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5838969A Expired GB1244239A (en) | 1968-11-29 | 1969-11-28 | High speed reciprocal and quotient computing apparatus |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1960018A1 (en) |
GB (1) | GB1244239A (en) |
-
1969
- 1969-11-28 GB GB5838969A patent/GB1244239A/en not_active Expired
- 1969-11-29 DE DE19691960018 patent/DE1960018A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
DE1960018A1 (en) | 1970-06-11 |
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