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Anadigics expands RFIC patent coverage

Posted: 08 Aug 2005     Print Version  Bookmark and Share

Keywords:rfic  broadband  wireless 

Broadband and wireless chip specialist Anadigics has expanded its patent portfolio with five new innovations covering developments in radio frequency integrated circuits (RFICs).

Perhaps the most impressive covers a load switching circuit for linear power amplifier (PA) applications that improves efficiency at different output power modes. Patent No 6,806,767 describes how output load can be adjusted according to the power requirements, which results in dynamic mode switching and thus higher levels of efficiency.

Patent 6,856,004 describes a method for creating a compact wireless PA with improved performance through a novel circuit layout. The device integrates transistors on a substrate with a via hole, which reduces the size of the device and improves amplifier performance.

Another (6,853,526) details a method of protection from overvoltage transients in CATV line amplifier ICs, while patent 6,882,227 was granted for a method of using the bias circuit to achieve improved linearity in wireless local area network (WLAN) power amplifiers. Here, the use of a bias circuit offers a simpler, cost-effective approach compared with traditional linearization circuit-design techniques.

Finally patent 6,842,075 was granted for an improved bias circuitry for wireless infrastructure gain blocks. The circuitry allows the IC to operate from a lower supply voltage, significantly reducing the power consumption of the device.

- John Walko

EE Times

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