Amplifying device

Details Amplifying device Amplifying device

2007-05-29

2007-05-29

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S260000, C330S009000, C330S254000

Reexamination Certificate

active

11212310

ABSTRACT:
An amplifying device comprising a first terminal to which an alternating signal is inputted; a second terminal connected via an external first resistor to a power supply line; a third terminal to be grounded; a second resistor provided on a signal line in between the second terminal and the third terminal; a differential amplifier, the alternating signal of which being inputted through the first terminal to one input terminal and an output according to the alternating signal being fed back to the other input terminal via a signal line in between the second terminal and the second resistor, and between the one input terminal and the other input terminal, a positive offset voltage higher than a maximum level of the alternating signal being produced in advance; and a third resistor provided between a signal line joining the first terminal and the one input terminal, and a signal line leading to the third terminal. A voltage waveform of the alternating signal that has been amplified on the basis of the resistances of the first and second resistors is produced at the second terminal.

REFERENCES:
patent: 3768028 (1973-10-01), Wolcott et al.
patent: 5276405 (1994-01-01), Mazzucco et al.
patent: 5570055 (1996-10-01), Gilbert
patent: 6064261 (2000-05-01), Stein et al.
patent: 6433611 (2002-08-01), Foroudi et al.
patent: 2003-243944 (2003-08-01), None

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