a High Linearity Frequency Down Converter and System Using the Converter

摘要

This invention is a highly linear frequency down to minimize the influence of the interference signal to the original signal at the receiving end relates to a converter and system using the same, in the frequency down-converter for converting the received radio signal to an intermediate frequency signal, is composed of two meters in the form of a common amplifier, LNA which amplifies the received radio signal (Low Noise Amplifier ) and; And having a mixing portion and a BCC (Base Current Compensated) current mirror are connected to the mixing unit input, the LNA and mixing the amplified signal generated from the local oscillator signal from the intermediate frequency signal by converting a DCM (Down Conversion Mixer ) it characterized by comprising, including, as well as to minimize the influence of the interference signal to the original signal at the receiving end. Low power consumption has high linearity and efficiency, and less sensitive to changes in current, single-chip (One-chip) can reduce the production cost, with mass production of the screen.