JPS5720843A - High-speed subtracting circuit - Google Patents
High-speed subtracting circuitInfo
- Publication number
- JPS5720843A JPS5720843A JP9604780A JP9604780A JPS5720843A JP S5720843 A JPS5720843 A JP S5720843A JP 9604780 A JP9604780 A JP 9604780A JP 9604780 A JP9604780 A JP 9604780A JP S5720843 A JPS5720843 A JP S5720843A
- Authority
- JP
- Japan
- Prior art keywords
- output
- subtracting circuit
- comparator
- denoted
- speed
- 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.)
- Pending
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
- G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
- G06F7/48—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
- G06F7/50—Adding; Subtracting
- G06F7/505—Adding; Subtracting in bit-parallel fashion, i.e. having a different digit-handling circuit for each denomination
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2207/00—Indexing scheme relating to methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F2207/38—Indexing scheme relating to groups G06F7/38 - G06F7/575
- G06F2207/3804—Details
- G06F2207/3808—Details concerning the type of numbers or the way they are handled
- G06F2207/3832—Less usual number representations
- G06F2207/3836—One's complement
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Pure & Applied Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computing Systems (AREA)
- Mathematical Optimization (AREA)
- General Engineering & Computer Science (AREA)
Abstract
PURPOSE:To realize a high-speed subtraction with just a pass through an adding circuit, by using a comparator for a subtracting process of two numbers showing the binary numbers. CONSTITUTION:A binary number A comprising A0, A1-AN is compared with a binary number B comprising B0, B1-BN. In this case, the output of a comparator is set at level ''0'' and ''1'' with A<B and A>B, respectively. In the case of A>B, a carry input CIN is at ''1'', and accordingly, the output S of an adding circuit is denoted by S=A+B'+1. Since the output of an inverter INV is at ''0'', the subtraction value D is denoted by D=S. Then the output S goes to S=A+B' because the input CIN is at ''0'' in A<B. At the same time, D=S' is satisfied since the output of the INV is at ''1''.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9604780A JPS5720843A (en) | 1980-07-14 | 1980-07-14 | High-speed subtracting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9604780A JPS5720843A (en) | 1980-07-14 | 1980-07-14 | High-speed subtracting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5720843A true JPS5720843A (en) | 1982-02-03 |
Family
ID=14154550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9604780A Pending JPS5720843A (en) | 1980-07-14 | 1980-07-14 | High-speed subtracting circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5720843A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61155219A (en) * | 1984-12-27 | 1986-07-14 | Babcock Hitachi Kk | Oxidizing method of calcium sulfite |
| JPH0465893U (en) * | 1990-10-17 | 1992-06-09 |
-
1980
- 1980-07-14 JP JP9604780A patent/JPS5720843A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61155219A (en) * | 1984-12-27 | 1986-07-14 | Babcock Hitachi Kk | Oxidizing method of calcium sulfite |
| JPH0469089B2 (en) * | 1984-12-27 | 1992-11-05 | Babcock Hitachi Kk | |
| JPH0465893U (en) * | 1990-10-17 | 1992-06-09 |
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