CMOS buffer with controlled slew rate

Details CMOS buffer with controlled slew rate CMOS buffer with controlled slew rate

1993-04-23

1999-03-02

Tokar, Michael J.

Electronic digital logic circuitry

Interface

Current driving

326 21, 326 33, H03K 19075, H03K 1716

Patent

active

058776346

ABSTRACT:
A method and apparatus for a circuit physically realizing a CMOS buffer with a controlled slew rate at the output and using no additional standby power to achieve the slew rate control is described. A feedback path from the output is coupled to transistors comprising a differential pair, the transistors are further coupled to a capacitance. The discharge rate of the capacitance and the size choices of the transistors in the circuit are used with the feedback path to control the high-to-low and low-to-high transition rate of the output. The circuit of the invention allows a system designer to construct a buffer for driving a bus with excellent on chip and bus signal noise characteristics using standard digital CMOS technology and having excellent standby and active power characteristics. An open drain buffer and a push-pull buffer are described. An integrated circuit implementing application logic coupled to input/output and output buffers embodying this circuit is disclosed. Other embodiments are also disclosed.

REFERENCES:
patent: 4614882 (1986-09-01), Parker et al.
patent: 4622482 (1986-11-01), Ganger
patent: 4857863 (1989-08-01), Ganger et al.
patent: 4959561 (1990-09-01), McDermott
patent: 5015880 (1991-05-01), Drake et al.
patent: 5028818 (1991-07-01), Go Ang et al.
patent: 5121000 (1992-06-01), Naghshineh
patent: 5122690 (1992-06-01), Bianchi
patent: 5138194 (1992-08-01), Yoeli

Affiliated with

Also associated with

Rating

CMOS buffer with controlled slew rate does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with CMOS buffer with controlled slew rate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CMOS buffer with controlled slew rate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-426045