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. 28, 2009
Filed:
Jun. 07, 2007
Zaman Iqbal Kazi, Kyoto, JP;
Junji Ito, Osaka, JP;
Toshihiro Shogaki, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An amplifier circuit includes a first bipolar transistor of which the emitter is connected to the ground, and a bias circuit of the first bipolar transistor. The bias circuit includes a second bipolar transistor constituting a current mirror circuit along with the first bipolar transistor, a first resistor connected to the bases of the first bipolar transistor and the second bipolar transistor, and a third bipolar transistor of which the emitter is connected to the bases of the first bipolar transistor and the second bipolar transistor through the first resistor, and of which the base is connected to the collector of the second bipolar transistor. The first bipolar transistor amplifies a signal input to the base thereof and then outputs the amplified signal from the collector of the first bipolar transistor.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile