Front end and high frequency receiver having quadrature low noise amplifier

Front end and high frequency receiver having quadrature low noise amplifier

A front end and a high frequency receiver (1) provided therewith are described, which front end comprises a quadrature low noise amplifier (2-1, 2-2) as a low noise amplifier. A high isolation between local oscillators (6-1, 6-2) and quadrature mixers (3-1, 3-2) is achieved thereby, reducing a DC of...

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Bibliographische Detailangaben
Hauptverfasser: P.G.M. BALTUS, D.M.W. LEENAERTS, E.C. DIJKMANS
Format: Patent
Sprache:eng
Schlagworte:
AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
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Beschreibung
Zusammenfassung:A front end and a high frequency receiver (1) provided therewith are described, which front end comprises a quadrature low noise amplifier (2-1, 2-2) as a low noise amplifier. A high isolation between local oscillators (6-1, 6-2) and quadrature mixers (3-1, 3-2) is achieved thereby, reducing a DC offset at mixer outputs (7, 8). The quadrature low noise amplifier may be implemented as a differential class AB cascade arrangement of MOST or FET semiconductors (15). A low distortion receiver (1) having a high linearity is the result.