Title:
【発明の名称】同調増幅器
Document Type and Number:
Japanese Patent JP2808549
Kind Code:
B2
Abstract:
A tuned amplifier which can be easily produced in an integrated circuit and by which the tuning frequency and the maximum damping coefficient are arbitrarily adjusted without mutual interference. The tuned amplifier is constituted of a first phase shifting circuit 1C composed of a converting means (F1) which convert an AC signal inputted through an input resistor Ri into AC signals of the same phase and opposite phase and outputs them, and a means which combines the two AC signals through a first reactance element C and a first resistor R, and shifts the phase of the combined AC signal, a second phase shifting circuit 2C which is composed of a converting means (F2) which converts the phase-shifted AC signal fed from the circuit 1C into AC signals of the same and opposite phases and output them and a means which combines the two AC signals through a second reactance element C and a second resistor R and shifts the phase of the combined signal in the same direction as that of the circuit 1C, a phase inverting circuit (3) which inverts the phase of the output of the circuit 2C and output the inverted signal, and a circuit which feeds back the output of the circuit (3) to the input (5) of the converting means of the circuit 1C through a feedback resistor Ro.
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Inventors:
IKEDA TAKESHI
OOE TADATAKA
OOE TADATAKA
Application Number:
JP52884095A
Publication Date:
October 08, 1998
Filing Date:
May 09, 1995
Export Citation:
Assignee:
IKEDA TAKESHI
International Classes:
H03F3/193; (IPC1-7): H03F3/191
Domestic Patent References:
| JP4834056B1 | ||||
| JP45530B1 |
Attorney, Agent or Firm:
Masaaki