Patent ID: 7417460
Filing Date: 2008-08-26
Classification: H03F,H04B,H04L

Abstract:
1. A multi-standard transmitter, comprising: a differential stage configured to be connected to a first voltage reference and to a second voltage reference, the differential stage including: a selective enabling circuit connected to said first and second inner circuit nodes, as well as to a third inner circuit node corresponding to a control terminal of said current generator transistor, said selective enabling circuit being configured to supply said inner circuit nodes with regulation signals to modify an operating mode of said multi-standard transmitter, wherein said selective enabling circuit comprises: a first enabling transistor configured to be connected between said first voltage reference and said second inner circuit node and having a control terminal configured to receive a first enabling signal; a differential amplifier, having a first input terminal connected to said second inner circuit node, a second input terminal being configured to receive a reference voltage, a control terminal configured to receive a second enabling signal and an output terminal connected to said third inner circuit node; and a second enabling transistor, having a first conducting terminal connected to said third inner circuit node and a control terminal configured to receive a third enabling signal.