The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 02, 1986
Filed:
Apr. 04, 1985
Siegfried K Wiedmann, Stuttgart, DE;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A bipolar logic circuit with superior speed/power characteristics is described. Circuit operation is based on a unique dynamic minority carrier charge exchange mechanism between the input diodes performing the logic and the oppositely poled level shift diode(s) at the input of the transistor output stage. To accomplish this, the input or logic diodes as well as the level shift diode(s) are laid out as large .tau..sub.s diodes with .tau..sub.s being the minority carrier charge storage time constant. Thus, despite very small dc currents during static operation (resulting in an extremely small dc power dissipation) high dynamic switching currents for turning-off as well as for turning-on the output transistors are achieved.