Amplifiers – With semiconductor amplifying device – Including push-pull amplifier
Patent
1991-11-21
1992-11-10
LaRoche, Eugene R.
Amplifiers
With semiconductor amplifying device
Including push-pull amplifier
330268, 330270, H03F 318
Patent
active
051627523
ABSTRACT:
An improved working point adjusting circuit for a single power amplifier having multiple output circuits. When this simple circuit is connected to a Class B transistor power amplifier to support two or more output channels or speakers, it adjusts the working point of the transistors in the output circuit of the power amplifier to the linear portion of the current-voltage characteristics of the transistor so the amplifier works in the level of a Class A amplifier. It provides many significant advantages including (1) much higher energy efficiency on output transistors; (2) much less signal distortion on loaded speakers; (3) simple circuitry for increased reliability; (4) low component count for reduced costs; and (5) individualized adjustment for each output channels which eliminates the different effect caused by the very fine differences between the multiple loaded output devices such as loudspeakers.
REFERENCES:
patent: 3912981 (1975-10-01), Tsurushima
patent: 4031482 (1977-06-01), Tsurushima
patent: 4057764 (1977-11-01), Yokoyama
patent: 4135162 (1979-01-01), Takahashi
patent: 4160216 (1979-07-01), Thornton
patent: 4165494 (1979-08-01), Becker
patent: 4167708 (1979-09-01), Goto
patent: 4178559 (1979-12-01), Nichols
patent: 4220930 (1980-09-01), Ahmed
patent: 4237425 (1980-12-01), Spiegel
patent: 4342966 (1982-08-01), Tamura
patent: 4404528 (1983-09-01), Yamaguchi
patent: 4424493 (1984-01-01), Schroeder
patent: 4454479 (1984-06-01), Spires
patent: 4540951 (1985-09-01), Ozawa et al.
patent: 4719431 (1988-01-01), Karsten
patent: 4723111 (1988-02-01), Verhoeven
Lakatos Josef
LaRoche Eugene R.
Ratliff R. A.
Rozsa Thomas I.
LandOfFree
Working point adjusting circuit for a single power amplifier hav does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Working point adjusting circuit for a single power amplifier hav, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Working point adjusting circuit for a single power amplifier hav will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2296675