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. 10, 1990
Filed:
Sep. 26, 1988
Akira Hatakeyama, Okazaki, JP;
Takeshi Nakane, Ichinomiya, JP;
Aisin Seiki Kabushiki Kaisha, Aichi pref., JP;
Abstract
A signal level transforming circuit includes a constant current circuit for supplying a constant current corresponding to a power voltage of an input signal to an electrical line connected between an output terminal connected with an input terminal via an input resistor and a common voltage level terminal, a low level clamping circuit for clamping the minimum value of the voltage at the output terminal to a first low level voltage, a voltage generating circuit for generating a constant voltage so as to transform a voltage signal in the input terminal into a binary signal, and a comparing circuit having a hysteresis characteristic and including a multi-collector type transistor having one collector connected with a voltage output terminal in the voltage generating circuit via a resistor for setting a comparing voltage, and having another collector connected to the output terminal, and a transistor inserted between a base of the multi-collector type transistor and the resistor for setting a comparing voltage and for turning ON when the voltage at the input terminal exceeds the voltage in the resistor.