JPH08503570A - 高速桁上げのためのロジック構造および回路 - Google Patents
高速桁上げのためのロジック構造および回路Info
- Publication number
- JPH08503570A JPH08503570A JP7508260A JP50826095A JPH08503570A JP H08503570 A JPH08503570 A JP H08503570A JP 7508260 A JP7508260 A JP 7508260A JP 50826095 A JP50826095 A JP 50826095A JP H08503570 A JPH08503570 A JP H08503570A
- Authority
- JP
- Japan
- Prior art keywords
- carry
- signal
- input
- logic
- bit
- 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.)
- Granted
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
- G06F7/501—Half or full adders, i.e. basic adder cells for one denomination
- G06F7/503—Half or full adders, i.e. basic adder cells for one denomination using carry switching, i.e. the incoming carry being connected directly, or only via an inverter, to the carry output under control of a carry propagate signal
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
- H03K19/173—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using elementary logic circuits as components
- H03K19/1733—Controllable logic circuits
- H03K19/1737—Controllable logic circuits using multiplexers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
- H03K19/173—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using elementary logic circuits as components
- H03K19/177—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using elementary logic circuits as components arranged in matrix form
- H03K19/17704—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using elementary logic circuits as components arranged in matrix form the logic functions being realised by the interconnection of rows and columns
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
- H03K19/173—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using elementary logic circuits as components
- H03K19/177—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using elementary logic circuits as components arranged in matrix form
- H03K19/17724—Structural details of logic blocks
- H03K19/17728—Reconfigurable logic blocks, e.g. lookup tables
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
- H03K19/173—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using elementary logic circuits as components
- H03K19/177—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using elementary logic circuits as components arranged in matrix form
- H03K19/17724—Structural details of logic blocks
- H03K19/17732—Macroblocks
-
- 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
- G06F2207/48—Indexing scheme relating to groups G06F7/48 - G06F7/575
- G06F2207/4802—Special implementations
- G06F2207/4812—Multiplexers
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.論理ブロックのアレーを含むプログラマブルロジックデバイスであって、 各論理ブロックの少なくとも一つの回路、すなわち 第1の入力値(Bi)を発生する手段と、 第2の入力値(Ai)を供給する入力端子と、 桁上げ入力(Ci)端子および桁上げ出力(Ci+1)端子と、 前記入力端子および前記桁上げ入力端子の一方を前記桁上げ出力端子に接続す るマルチプレクサ(923)と、 前記第1の入力値が前記第2の入力値に等しいとき(Ai=Bi)だけ前記入力 端子を前記桁上げ出力端子に接続するとともに、前記第1の入力値が前記第2の 入力値と等しくないとき(Ai≠Bi)だけ前記桁上げ入力端子を前記桁上げ出力 端子に接続するように前記マルチプレクサを動作させる伝搬信号を発生する参照 用テーブル(903)と を含む一つの回路を備えるプログラマブルロジックデバイス。 2.請求項1記載のプログラマブルロジックデバイスであって、 入力として前記伝搬信号と前記桁上げ入力端子への信号とを受け、前記伝搬信 号と前記桁上げ入力端子への前記信号とのXOR関数を発生できる関数発生手段 (904) をさらに含むプログラマブルロジックデバイス。 3.前記関数発生手段(904)がXORゲートである請求項2記載のプログ ラマブルロジックデバイス。 4.前記論理ブロックの互いに隣接する二つが前記入力値の和および桁上げを 計算し、前記和を計算するほうの前記論理ブロックが少なくとも二つの入力の全 ての関数を発生できる参照用テーブル(904)を含む請求項1記載のプログラ マブルロジックデバイス。 5.前記第1の入力値(Bi)を発生する手段が前記参照用テーブルへの格納 関数と組み合わされた複数の入力端子を含み、その参照用テーブルが前記第1の 入力値を前記複数の入力のユーザにより選択された関数として供給する請求項1 記載のプログラマブルロジックデバイス。 6.前記第1の入力値(Bi)を発生する前記手段が前記第1の入力値を含む 参照用テーブルへの入力を含む請求項1記載のプログラマブルロジックデバイス 。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/116,659 | 1993-09-02 | ||
US08/116,659 US5349250A (en) | 1993-09-02 | 1993-09-02 | Logic structure and circuit for fast carry |
PCT/US1994/009864 WO1995006979A1 (en) | 1993-09-02 | 1994-08-31 | Logic structure and circuit for fast carry |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08503570A true JPH08503570A (ja) | 1996-04-16 |
JP3594601B2 JP3594601B2 (ja) | 2004-12-02 |
Family
ID=22368495
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50826095A Expired - Lifetime JP3594601B2 (ja) | 1993-09-02 | 1994-08-31 | 高速桁上げのためのロジック構造および回路 |
Country Status (5)
Country | Link |
---|---|
US (1) | US5349250A (ja) |
EP (2) | EP1126613A3 (ja) |
JP (1) | JP3594601B2 (ja) |
DE (1) | DE69429073T2 (ja) |
WO (1) | WO1995006979A1 (ja) |
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-
1993
- 1993-09-02 US US08/116,659 patent/US5349250A/en not_active Expired - Lifetime
-
1994
- 1994-08-31 EP EP00115392A patent/EP1126613A3/en not_active Withdrawn
- 1994-08-31 EP EP94926045A patent/EP0667059B1/en not_active Expired - Lifetime
- 1994-08-31 JP JP50826095A patent/JP3594601B2/ja not_active Expired - Lifetime
- 1994-08-31 WO PCT/US1994/009864 patent/WO1995006979A1/en active IP Right Grant
- 1994-08-31 DE DE69429073T patent/DE69429073T2/de not_active Expired - Lifetime
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EP1126613A3 (en) | 2006-04-05 |
EP0667059A1 (en) | 1995-08-16 |
WO1995006979A1 (en) | 1995-03-09 |
US5349250A (en) | 1994-09-20 |
DE69429073D1 (de) | 2001-12-20 |
EP0667059B1 (en) | 2001-11-14 |
DE69429073T2 (de) | 2002-03-21 |
EP1126613A2 (en) | 2001-08-22 |
JP3594601B2 (ja) | 2004-12-02 |
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