High definition display such as full HD, Plasma TV and LED TV is currently expanding its market share in individual homes. HD quality programs and contents are also broadcasted through various channels by satellite TV, HDTV, VOD and 3D TV. CATV cables do not only deliver cable TV, but also two-way broadband internet to each subscriber. All these contents require higher definition quality for better viewing experience.
RFHIC recently developed an e-pHEMT (Enhancement Mode Pseudomorphic High Electron Mobility Transistor) MMIC amplifier which can easily compensate RF loss from the Coaxial Cable line. Higher gain of the device is very useful when designing the CATV-HFC line extender system, and the MMIC also provide low NF of 2~3dB with all matching circuits.
Protective diode is designed within the MMIC to enhance ruggedness against ESD and other environmental damage. The device also can handle higher power levels such as 79ch @ 40dBmV.
Forward amplifier’s frequency range is 40~1002MHz with 20dB gain and has less than 1dB flatness over the full frequency. Reverse amplifier can be designed by the same MMIC, with only changing the matching circuits to cover 5~65MHz. Therefore, the engineer can design the full system by using only several MMICs.
Existing high power MMIC had lower gain like 12dB hence building a 40dB gain CATV-HFC line extender needed 4 stage amplification. This means more external matching circuits and components with additional cost and bigger size. RFHIC’s new MMIC has 20dB gain at one stage, so one can build a forward amplifier with only two MMIC from RFHIC. Reverse amplifier design is even more simple by using one MMIC of 20 or 25dB gain IC. Not only saving the cost of the IC, but your system will be greener by consuming less power and reducing the overall system size.
AE617, AE618, AE514 are push-pull devices with SOIC-8 plastic SMT packages.
AE314 and AE427 are single stage SOT-89 plastic SMT packages.
These amplifiers can be applied to CATV/HFC/Satellite line extenders, Drop amplifiers, Trunk amplifiers, Head-end equipment, RF nodes, and low cost CATV Hybrid amplifiers.