Wide-band amplifier system

Details Wide-band amplifier system Wide-band amplifier system

1982-06-14

1985-01-01

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330 85, 330107, 330256, 330261, 330294, 330311, H03F 134

Patent

active

044918020

ABSTRACT:
A system suitable for the amplification of wide-band signals, with frequencies from zero to the gigahertz order, for oscilloscopic observation or recording. Included are first and second amplifier circuits. The first amplifier circuit, typically of multistage configuration, has two inputs, one for the reception of a wide-band signal to be amplified and the other for the reception of a low-band signal, and puts out an amplified wide-band signal in response to the wide- and low-band input signals. Comprising an operational amplifier, the second amplifier circuit also has two inputs for the reception of the low-frequency components of the wide-band input and output signals of the first amplifier circuit and, in response to these inputs, produces the low-band signal for delivery to the mentioned other input of the first amplifier circuit. The second amplifier circuit may produce the low-band signal from either the difference between, or the sum of, the low-frequency components of the wide-band input and output signals.

REFERENCES:
patent: 3693108 (1971-09-01), Iijima et al.
patent: 3768028 (1973-10-01), Wolcott et al.
patent: 3889060 (1975-06-01), Goto et al.

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