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Low-noise RF amplifier improves receiver performance

Posted: 28 May 2007     Print Version  Bookmark and Share

Keywords:RF amplifier  high linearity  cable TV front-end 

Anadigics Inc. has introduced its single-chip, low-noise, high linearity RF amplifier with integrated gain control that is said to improve receiver performance in cable TV digital STBs and analogue and DTVs. Aimed at cable TV front-end applications, the fully integrated ABA3130 is designed to replace existing discrete solutions.

To ensure compatibility with tuners being developed for the 1GHz cable systems, the ABA3130 features wideband operation from 50MHz to 1.1GHz. The RF amplifier exhibits a typical noise figure of 4.5dB at 5dB gain, which enables clearer analogue pictures and better reception on digital channels, said Anadigics.

The ABA3130 also offers a wide dynamic gain control range of 37dB to prevent overloading tuner front ends. The device delivers exceptional linearity over the full dynamic gain range, minimising distortion and ensuring a high-quality signal and crystal-clear video, said Anadigics.

ABA3130 accepts a single-ended (unbalanced) input and converts it to a differential (balanced) output, which some integrated tuners require for optimal performance. This feature eliminates the need for a separate balun transformer on the circuit board. The high level of integration and 3-by-3-by-1mm form factor further reduce the amount of board space required for RF front-end solutions.

Operating from a single 5V supply, the ABA3130 is offered in a 12-pin surface-mount QFN package that is manufactured using a material set consistent with the European Union's RoHS directive.

- Gina Roos

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