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:
Apr. 11, 1995
Filed:
May. 10, 1993
Harufusa Kondoh, Hyogo, JP;
Hisayasu Sato, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
The output circuit according to the present invention includes a bipolar transistor (Q.sub.1), a resistance (R.sub.1) and a constant current source. The transistor (Q.sub.1) has its collector connected to a power supply node (V.sub.CC), its emitter connected to an output node (Do), and its base connected to the other end of the resistance (R.sub.1). The resistance (R.sub.1) has one end connected to the power supply node (V.sub.CC). The constant current source is connected between a power supply node (V.sub.EE) and the base of the transistor (Q.sub.1) and is turned on/off in response to an input signal (IN) to generate a current (I.sub.1) for bringing output into a low level only in the on state. The constant current source does not generate the current (I.sub.1) at the time of output of a high level, and causes the current (I.sub.1) to flow through the resistance (R.sub.1) only at the time of output of a low level. As a result, power consumption can be reduced.