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Anadigics receives patent for multi-band amplifier

Anadigics has added another patent to its growing portfolio of intellectual property.
Anadigics has been granted its third patent for the development of a wireless multi-band amplifier circuit. US Patent No. 6,501,331 was awarded for the development of a GaAs MMIC dual-band amplifier for use in wireless handsets for operation at either 800 MHz or the 1900 MHz band to provide gain and input/output impedance.

Switching impedance networks are used at the input and output of the amplifier to provide matching input impedance and desired output impedance for operation in the two bands. Switching impedance networks are also used between any successive stages of the amplifier to provide proper inter-stage impedance.

The dual band amplifier includes a bias control circuit which biases the amplifier to operate in A, B, AB or C mode. The amplifier can be used for the AMPS 800 or the GSM 900 operation or any other cellular operation such as the PCS 1900, and it can be switched between the two operations by simply applying a proper control signal to the amplifier.

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