METHOD FOR CHANGING-OVER OUTPUT VOLTAGE OF POWER AMPLIFIER AND THE POWER AMPLIFIER

PROBLEM TO BE SOLVED: To provide a power amplifier output voltage change-over method with which a 100-system is easily changed-over to a 70-system, without the use of two kinds of power source voltages and also to provide a power amplifier to be used in the method. SOLUTION: This amplifier is provid...

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Bibliographische Detailangaben
1. Verfasser:	TANIMOTO KENICHI
Format:	Patent
Sprache:	eng
Schlagworte:	AMPLIFIERS BASIC ELECTRONIC CIRCUITRY CONTROL OF AMPLIFICATION ELECTRICITY
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a power amplifier output voltage change-over method with which a 100-system is easily changed-over to a 70-system, without the use of two kinds of power source voltages and also to provide a power amplifier to be used in the method. SOLUTION: This amplifier is provided with a voltage amplifying part 13 and a current amplifying part 14 and is constituted to change-over a first rated output voltage 70V so as to have the second rated output voltage 100V having than it and using them as a final output voltage. In this case, a voltage equivalent to the 100V-system outputted from the voltage amplifying part 13 is used in a normal state. When the 70V-system is used, the output voltage of the voltage amplifying part 13 is clipped so as to be the 70-system and inputted to the currant amplifying part 14. Therefore, the 100-system and the 70-system are easily changed-over without the used of the two kinds of power source voltages.