Patent Number: 7,787,847

Title: Front end and high frequency receiver having quadrature low noise amplifier

Abstract: A front end and a high frequency receiver provided therewith are described, which front end comprises a quadrature low noise amplifier as a low noise amplifier. A high isolation between local oscillators and quadrature mixers is achieved thereby, reducing a DC offset at mixer outputs. The quadrature low noise amplifier may be implemented as a differential class AB cascode arrangement of MOST or FET semiconductors. A low distortion receiver having a high linearity is the result.

Inventors: Dijkmans; Eise Carel (Eindhoven, NL), Leenaerts; Dominicus Martinus Wilhelmus (Eindhoven, NL), Baltus; Petrus Gerardus Maria (Eindhoven, NL)

Assignee: ST-Ericsson SA

International Classification: H04B 1/06 (20060101)

Expiration Date: 8/31/12018