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:
Jun. 14, 2011
Filed:
Dec. 04, 2006
Erik Bert Busking, Den Haag, NL;
Andries Peter DE Hek, Hardinxveld Giessendam, NL;
Erik Bert Busking, Den Haag, NL;
Andries Peter De Hek, Hardinxveld Giessendam, NL;
Abstract
An amplifier circuit includes an amplifier stage () having an amplifier transistor () with a gate coupled to an input () of the amplifier stage, a source coupled to a reference connection (gnd) and a drain coupled to a positive power supply connection (V+). The amplifier circuit includes a bias stage () having a bias transistor (), a drain resistance () and a source resistance (). The bias transistor includes a gate coupled to a negative power supply connection (V−), a source coupled to the negative power supply connection (V−) via the source resistance and a drain coupled to the reference connection via the drain resistance and to the gate of the amplifier transistor. The bias stage includes a further resistance () coupled from a node between the source of the bias transistor and the source resistance of the bias transistor to a circuit node that carries a voltage higher than the voltage at the negative power supply connection.