The MoCA 1.1 transceiver architecture is based on direct conversion for both the transmitter and receiver, which eliminates bulky and expensive external filters. It integrates wideband LNA and power amplifier. The DC coupled transmitter and receiver basebands consist of filters designed to support the modulation bandwidth of 25 MHz with ± 30% variation range, variable gain amplifiers, and DC correction loops using on chip DAC's. The internal digitally controlled receiver and transmitter AGC loops provide a low noise receiver with a dynamic range over 70 dB and a transmitter with wide range output powers. An integer-N PLL synthesizer is implemented to generate LO and clock frequencies with superior phase noise.
Multiple calibration loops are employed to correct various PVT impairments including transmitter LO leakage, IQ imbalance, and variations of low pass filter corner frequencies. In the transmitter path, an envelope detector is designed to detect the power amplifier output power and the transmitter AGC gain is then adjusted to guarantee output power to meet MoCA spectrum requirements through the internal power control loop.
RF Transceiver for MoCA 1.1
Single-Ended 75 ? Input /Outputs, No balun required
Fully Integrated calibration loops and algorithms
Various power down and stand-by modes for power saving
Fully integrated on-chip power amplifier with 21dBm saturated output power
Parallel interface for fast communication with baseband IC
IP platform flexible for modifications for customer specific application
Supported frequency band: 800 – 1600 MHz
3.3 V Analog and Digital supply with integrated regulators