CIRCUIT ARRANGEMENT FOR ADJUSTING THE IMPEDANCE OF A DIFFERENTIAL ACTIVE COMPONENT

CIRCUIT ARRANGEMENT FOR ADJUSTING THE IMPEDANCE OF A DIFFERENTIAL ACTIVE COMPONENT

The active component (400, 500) of a radio device comprises a first transistor (Q1) and a second transistor (Q2). The differential input of the active component comprises a first input line (RF+) and a second input line (RF-), of which the first input line is coupled to the base of the first transis...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: MURTOJARVI SIMO
Format: Patent
Sprache:eng
Schlagworte:
AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TOANOTHER
ELECTRICITY
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Beschreibung
Zusammenfassung:The active component (400, 500) of a radio device comprises a first transistor (Q1) and a second transistor (Q2). The differential input of the active component comprises a first input line (RF+) and a second input line (RF-), of which the first input line is coupled to the base of the first transistor (Q1) and the second input line is coupled to the base of the second transistor (Q2). In order to match the input impedance there is cross-feedback (Rfb') between the first transistor (Q1) and the second transistor (Q2).