Title:
AM ELECTRONIC SYNCHRONIZATION TUNER
Document Type and Number:
Japanese Patent JPH0621842
Kind Code:
A
Abstract:
PURPOSE: To allow the up-conversion system AM electronic synchronization tuner to receive selectively an MW band and an SW band without disturbance.
CONSTITUTION: A signal inputted from an antenna is inputted to a tuning use lowpass filter section via a signal amplifier FET and an AGC transistor (TR). The tuning use low pass filter section consists of an MW use low pass filter 3 and an SW low pass filter 4 connected in parallel and a bias changeover circuit 6 selects either of them. The selected low pass filter circuit receives one of the MW and SW bands and outputs the signal of the band to an IC 5 forming the up-conversion system frequency conversion section.
Inventors:
OKUI SHIGEHIRO
Application Number:
JP19607992A
Publication Date:
January 28, 1994
Filing Date:
June 29, 1992
Export Citation:
Assignee:
MITSUMI ELECTRIC CO LTD
International Classes:
H04B1/10; C04B28/04; H04B1/16; H04B1/18; H04B1/26; (IPC1-7): H04B1/18; H04B1/10; H04B1/16; H04B1/26
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