Dsp Group Limited

Avi Cohen

Michael Gulko

Ron Pongratz

Udi Suissa

A biasing device for direct current (DC) biasing a linear power amplifier that comprises multiple linear power amplifier circuits that are ideally identical to each other; wherein the biasing device may include a replica circuit that is a replica of a linear power amplifier circuit of the multiple linear power amplifier circuits; and a bias control circuit; wherein the bias control circuit is configured to feed the replica circuit with one or more DC biasing signals thereby maintaining at a constant value a replica DC current that is consumed by the replica circuit, and maintaining at a fixed value a replica DC voltage of a replica output node of the replica circuit; and wherein the replica circuit is coupled the multiple linear power amplifier circuits and is configured to supply DC voltage bias signals that force each linear power amplifier circuit of the multiple linear power amplifier circuits to consume a linear power amplifier circuit DC current that equals the replica DC current, when the linear power amplifier circuit is fed with a linear power amplifier DC voltage that either equals the replica DC voltage or differs from the replica DC voltage by a fraction of the replica DC voltage.

PVT robust closed loop CMOS bias for linear power amplifier

A novel and useful radio frequency (RF) front end module (FEM) circuit that provides high linearity and power efficiency and meets the requirements of modern wireless communication standards such as 802.11 WLAN, 3G and 4G cellular standards, Bluetooth, ZigBee, etc. The configuration of the FEM circuit permits the use of common, relatively low cost semiconductor fabrication techniques such as standard CMOS processes. The FEM circuit includes a power amplifier made up of one or more sub-amplifiers having high and low power circuits and whose outputs are combined to yield the total desired power gain. An integrated multi-tap transformer having primary and secondary windings arranged in a novel configuration provide efficient power combining and transfer to the antenna of the power generated by the individual sub-amplifiers.

DC-DC converter incorporating trim cell

The subject matter discloses an apparatus residing within an RF chip, comprising:

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Kfar Saba, Israel

Avi Cohen