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:
Feb. 18, 2003
Filed:
Mar. 16, 2000
Evald Koitsalu, Huddinge, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
A portable radio transceiver has a transmitter power amplifier (PA) and a series transistor (V ), which is connected to the transmitter power amplifier and is adapted, in response to a transmission control signal (TX on/off), to control transmission by the transmitter power amplifier. Negative bias generating means provides negative bias (V ) to the transmitter power amplifier and is also used for increasing a voltage applied to the gate of the series transistor so as to reduce its resistance. The negative bias generating means has a second transistor (V ) connected to the gate of the series transistor (V ), and a third transistor (V ), the gate of which is adapted to receive the transmission control signal (TX on/off) It also has a capacitor (C ) connected between the second and third transistors, and a diode means (D ) connected between the capacitor and the second transistor.