Domino logic circuit having a clocked precharge

• US 6,104,213 A
• Filed: 03/02/1998
• Issued: 08/15/2000
• Est. Priority Date: 03/02/1998
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Takahashi, Osamu, Dhong, Sang Hoo, Silberman, Joel Abraham, Ghoshal, Uttam Shyamalindu
• Primary Examiner(s): Tokar, Michael
• Assistant Examiner(s): CHO, JAMES HYONCHOL
• Application Number:
  US09/032,820
• Time in Patent Office: 897 Days
• Field of Search: 326/98, 326/97, 326/93, 326/95, 326/96, 326/112, 326/119, 326/121, 326/83, 326/86, 327/534
• US Class Current: 326/98
• CPC Class Codes: H03K 19/0963 using transistors of complementary type H03K19/0966 takes precedence

Abstract

A domino logic circuit having a clocked precharge is disclosed. The domino logic circuit includes a precharge transistor, a discharger transistor, several input transistors, and an invertor. Connected to a power supply, the precharge transistor receives a first clock input. The discharge transistor, connected to the ground, receives a second clock input. The input transistors is coupled between the precharge transistor and the discharge transistor. Each of the input transistors receives a signal input. The inverter has an input coupled to the precharge transistor, and an output to yield a signal output. The inverter includes a first transistor and a second transistor connected in series, and the output of the inverter is connected to a body of the first transistor.

Claims

1. A domino logic circuit, comprising:

a precharge transistor connected to a power supply, wherein said precharge transistor receives a first clock input;

a discharge transistor connected to ground, said discharge transistor receives a second clock input;

one or more input transistors coupled between said precharge transistor and said discharge transistor, wherein each of said one or more input transistors receives a signal input; and

an inverter having an input coupled to said precharge transistor and an output to yield a signal output, wherein said inverter includes a first transistor and a second transistor connected in series, wherein said output is directly connected to a body of said first transistor.

2. The domino logic circuit according to claim 1, wherein said first transistor is a P-channel transistor, said second transistor is an N-channel transistor, and said body is an N-well.

3. The domino logic circuit according to claim 2, wherein said first clock is complement to said second clock.

4. The domino logic circuit according to claim 3, wherein said precharge transistor and said discharge transistor are N-channel transistors.

5. The domino logic circuit according to claim 4, wherein said precharge transistor is a zero-threshold or low-threshold transistor.

6. The domino logic circuit according to claim 4, wherein said plurality of transistors are N-channel transistors.

7. A domino logic circuit having a clocked precharge, comprising:

a precharge transistor having a source connected to a power supply, for receiving a first clock input;

a discharge transistor having a source connected to the ground, for receiving a second clock input;

a plurality of transistors coupled between a drain of said precharge transistor and a drain of said discharge transistor, wherein each of said plurality of transistors receives a signal input; and

an inverter having an input coupled to said drain of said precharge transistor, and an output to yield a signal output, wherein said inverter includes a first transistor and a second transistor connected in series, wherein said output is directly connected to a body of said first transistor.

8. The domino logic circuit according to claim 7, wherein said first transistor is a P-channel transistor, said second transistor is an N-channel transistor, and said body is an N-well.

9. The domino logic circuit according to claim 8, wherein said first clock is complement to said second clock.

10. The domino logic circuit according to claim 9, wherein said precharge transistor and said discharge transistor are N-channel transistors.

11. The domino logic circuit according to claim 10, wherein said precharge transistor is a zero-threshold or low-threshold transistor.

12. The domino logic circuit according to claim 10, wherein said plurality of transistors are N-channel transistors.