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:
Aug. 24, 1999
Filed:
Jun. 01, 1998
Jesus L Finol, Gilbert, AZ (US);
David K Lovelace, Chandler, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A differential amplifier (10) receives a differential input signal (V.sub.IN). The input signal is attenuated by a first attenuator (12) and applied to a tan h amplifier (16). The input signal is also attenuated by a second attenuator (14) and applied to a sin h amplifier (18). The input signals to the tan h amplifier and sin h amplifier are independently attenuated. The transfer functions of the tan h amplifier and the sin h amplifier each have a linear region and a non-linear region. The output of the tan h amplifier and the sin h amplifier are summed (26) so that the non-linear region of the tan h amplifier cancels with the non-linear region of the sin h amplifier. The overall transfer function of the differential amplifier is linear over a wide range of input signal amplitudes by the cancellation of the non-linear regions.