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:
Jul. 09, 2002
Filed:
Jul. 05, 2000
Marco Corsi, Plano, TX (US);
Priscilla Escobar-Bowser, Plano, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An output stage ( ) is provided having transistors of the same polarity type, which function to amplify the input signal at a wide range of frequencies, with low power consumption and low crossover distortion. By biasing the output transistors to remain on during both the positive and negative voltage swing of the input signal, low power consumption as well as low output crossover distortion is achieved. A high efficiency, low crossover distortion, current amplifier circuit for amplifying an input signal (V ) in accordance with this present invention includes an output driver ( ), a current source (I ) and a translinear loop circuit ( ). The output driver ( ) includes a sourcing circuit (Q ). The current source (I ), connected to the output driver ( ), provides bias current to the sourcing circuit. The translinear loop circuit ( ), connected to the output driver ( ), receives the input signal (V ). The translinear loop ( ) includes a sinking circuit (Q ), such that the translinear loop circuit ( ) is responsive to the a sinking current of the sinking circuit and operable to provide a bias current signal proportional to the sinking current.