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. 20, 1983
Filed:
Jul. 01, 1981
Kenji Suzuki, Hamamatsu, JP;
Nippon Gakki Seizo Kabushiki Kaisha, Hamamatsu, JP;
Abstract
An single-ended push-pull amplifier comprises first and second complementary single-ended push-pull circuits connected in parallel across a power source. Each push-pull circuit has paired complementary transistors and an output connected together to drive a common load such as a loudspeaker. Inputs of the first and second push-pull circuits are connected with a bias circuit connected to receive an audio signal to be amplified. The first to fourth transistors are so controlled that the first and second transistors are operated Class A at small signal levels, and the first and fourth complementary transistor pair and the second and third complementary transistor pair are operated Class B at large signal levels, thus producing a low distortion factor and a high power efficiency.