Cartesian Feedback Loop Transmitter

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Two-way Radio ICs
AK2403 is transmitter IC for TETRA with Cartesian Feedback Loop Linearization Technique. It consists of DAC, differential amplifier, I/Q modulator and driver amplifier for forward path and of attenuator, demodulator, phase shifter and IF amplifier for feedback path.


*under development

Frequency range: 30MHz to 1GHz

Operation Voltage: 2.7 to 3.3V

Forward / Feedback path: 30dB gain control

Forward path IQ modulator

Feedback path IQ demodulator

Vector adder for 360 degree phase adjustment

Active HPF for stability detection

Delta-sigma Fractional-N PLL

Integrated DAC

64pin-QFN package

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Block Diagram

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