Amplifiers – With amplifier condition indicating or testing means
Patent
1985-11-22
1987-07-14
Mullins, James B.
Amplifiers
With amplifier condition indicating or testing means
328 26, 330252, 455155, H03F 345
Patent
active
046805532
ABSTRACT:
An intermediate frequency amplifier stage is disclosed, in which linearity of a signal strength detection output is improved. The intermediate frequency amplifier stage includes a plurality of intermediate frequency amplifiers, a plurality of double-wave rectifiers each coupled to the associated intermediate frequency amplifier and making full-wave rectification of the signal supplied from the associated intermediate frequency amplifier, and an adder circuit adding the rectification outputs of the respective double-wave rectifiers.
REFERENCES:
patent: 3241078 (1966-03-01), Jones
patent: 3697685 (1972-10-01), Lunn
patent: 4555671 (1985-11-01), Numata
Baskerville, "A Single-Chip Television IF System", IEEE J. of Solid-State Circuits, vol. SC-7, No. 6, Dec. 1972, pp. 455-461.
Kasai Yoshihiko
Kimura Katsuji
Sato Toshifumi
Yamasaki Koji
Yokoyama Yukio
Mullins James B.
NEC Corporation
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