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:
Sep. 05, 2000
Filed:
May. 28, 1999
Menping Chang, Cupertino, CA (US);
Vuong K Le, Milpitas, CA (US);
Kendin Communications, Inc., Sunnyvale, CA (US);
Abstract
An output driver is provided with driving and filtering capability. An output current driver and output voltage driver embodiments are provided. The output current driver includes, an operational amplifier having a first input for receiving a first input voltage V.sub.1, a second input for receiving a second input voltage V.sub.2, and an output for generating an output voltage Vc. The output current driver also includes a transistor having an input terminal coupled to the output of the operational amplifier for receiving the output voltage Vc, a first terminal coupled to a differential pair, and a second terminal coupled to the second input of the operational amplifier, wherein an output current I.sub.out flows across the transistor. A control current I.sub.CONTROL determines a value of the first input voltage V.sub.1, while the output voltage Vc controls the transistor so that the second voltage V.sub.2 becomes equal to the first voltage V.sub.1. The voltage driver includes, a first plurality of parallel modules coupled to an output load and capable of setting a first equivalent resistive value and a second equivalent resistive value, and a second plurality of parallel modules coupled to the output load and capable of setting a third equivalent resistive value and a fourth equivalent resistive value. At least some of the equivalent resistive values determine an output voltage value across the output load.