Amplifiers – With amplifier condition indicating or testing means
Patent
1994-02-08
1995-07-18
Mottola, Steven J.
Amplifiers
With amplifier condition indicating or testing means
330140, H03G 330
Patent
active
054345375
ABSTRACT:
The object of the invention is a circuit for monitoring the power of a transmitter amplifier. In the solution according to the invention, the detected DC voltage level (V.sub.det) corresponding to the output power is compressed at high output levels by using as the coupling capacitance a capacitance diode (7) such that the capacitance of this component, and thereby the tightness of the coupling, diminishes as the detected voltage level increases. The invention can be employed, for example, in the power control of a mobile phone's transmitter.
REFERENCES:
patent: 4392245 (1983-07-01), Mitana
patent: 5204637 (1993-04-01), Trinh
patent: 5291150 (1994-03-01), Saarnimo et al.
Finnish Office Action dated 23 Sep. 1993 on priority Finnish Application No. 930632 and English translation thereof.
Patent Abstracts of Japan, vol. 16, No. 567 (E-1296) 8 Dec. 1992 and JP-A-04 219 001 (Fujitsu) "Microwave Band Amplifier".
Patent Abstracts of Japn, vol. 9, No. 69, (E-305) 29 Mar. 1985 & JP-A-59 207 750 (Nippon Technical KK) "Receiving Circuit".
Mottola Steven J.
Nokia Mobile Phones Ltd.
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