Method and apparatus for active termination of a line driver/rec

Details Method and apparatus for active termination of a line driver/rec Method and apparatus for active termination of a line driver/rec

1995-07-05

1996-06-25

Westin, Edward P.

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Bus or line termination

326 86, H03K 1716, H03K 190175

Patent

active

055303773

ABSTRACT:
A method and apparatus for providing active termination of a transmission line is accomplished by providing a pair of complementary transistors operably coupled to the transmission line, wherein one of the transistors provides the active termination impedance when the transmission line is in a first state, and the other transistor provides the active termination when the transistor is in a second state. The complementary pair of transistors may be gated such that when it is desired to remove the active termination from the circuit, it can be done. The line driver/receiver reduces part count by commonly using circuitry in the active termination stage and the receiver stage.

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Author unknown, IBM Disclosure Stmt. #IBMCGK 7995 (3 pages).
T. Ludwig et al., IBM Tech. Disc. Bul. vol. 30, No. 7, Dec. 1987, pp. 393-395.
"Active Terminators for CMOS Drivers", IBM Technical Disclosure Bulletin, vol. 32, No. 4A, Sep. 1989.

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