APPARATUS FOR CONTROLLING FREQUENCY CHARACTERISTIC OF RECEIVING LOW-NOISE AMPLIFIER

PURPOSE: An apparatus for controlling a frequency characteristic of a receiving low-noise amplifier is provided to perform a gain evenness of a receiving frequency band and improve a characteristic of a CDMA intermodulation by adjusting a gain of a wireless frequency low-noise amplifier. CONSTITUTIO...

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Bibliographic Details
Main Author JUNG, SEONG HO
Format Patent
LanguageEnglish
Published 25.10.2000
Edition7
Subjects
AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
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Summary:PURPOSE: An apparatus for controlling a frequency characteristic of a receiving low-noise amplifier is provided to perform a gain evenness of a receiving frequency band and improve a characteristic of a CDMA intermodulation by adjusting a gain of a wireless frequency low-noise amplifier. CONSTITUTION: A duplexer(100) receives a wireless frequency signal received through an antenna(100) and transmits the received wireless frequency signal to the outside. A low-noise amplifier(200) receives the wireless frequency signal transmitted from the duplexer(100) to removes a noise and amplifies the wireless frequency signal as a predetermined amplifying level. A filter unit(400) receives the signal amplified in the low-noise amplifier(200) and filters the received signal as a desired band signal. A mixer(500) receives a signal transmitted through the filter unit(400) and converts the wireless frequency into an intermediate frequency. A current control unit(300) adjusts a providing amount of a driving current provided to the low-noise amplifier(200) to adjust a frequency characteristic for performing an evenness of the frequency characteristic of a gain amplified in the low-noise amplifier(200).
Bibliography:Application Number: KR19990011235