| 摘要 |
A DMB receiver with an output voltage compensation circuit is provided to enable a receive sensitivity maintenance circuit unit to control receive electric field strength by being turned on/off by using an AGC voltage of a variable gain amplifier, thereby preventing operation characteristics of active elements configuring the DMB receiver from being deteriorated when a signal, received from an antenna, is a signal of a strong electric field and stably maintaining total receive sensitivity of the DMB receiver. A DMB(Digital Multimedia Broadcasting) receiver comprises the followings: variable filters(120,130) which selectively pass a DMB signal received from an antenna(110); a low noise amplifier(125) which lowers a noise figure of the DMB signal selectively passed and increases a gain; a variable gain amplifier(135) which automatically controls a gain of the DMB signal amplified by the low noise amplifier(125); and a receive sensitivity maintenance circuit unit(115) which controls receive electric field strength by being turned on/off by using an AGC(Automatic Gain Control) voltage of the variable gain amplifier(135).
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