Description
The CXA3174N is a 4-bit digital control variable gain amplifier suitable for the communications.

Features
• Gain control amplifier with the wide gain variable range
• Doubler circuit for the LO (local) signal eliminates need for the phase shifter

Functions
• IF signal gain control circuit
• I/Q quadrature demodulator
• Doubler circuit for the LO signal
• Gain control by the 4-bit digital data
• Power saving

Applications
    GSM and PCS portable telephones