Detailed Description

The SC1905 is the latest generation of RFPAL linearizer IC. The maximum signal bandwidth has been increased to

100MHz from the previous generation SC1894 device in order to support 5G signals.

Introduction to Predistortion Using the SC1905

Wideband signals in today’s telecommunications systems have high peak-to-average ratios and stringent spectral

regrowth specifications. These specifications place high linearity demands on power amplifiers. Linearity may be

achieved by backing off output power at the price of reducing efficiency. However, this increases the component and

operating costs of the power amplifier. Better linearity may be achieved through the use of digital predistortion and other

linearization techniques, but many of these are time consuming and costly to implement. Wireless service providers are

deploying networks with wider coverage, greater subscriber density, and higher data rates. These networks require more

efficient power amplifiers. Additionally, the emergence of distributed architectures and active antenna systems is driving

the need for smaller and more efficient power amplifier implementations. Further, there continues to be a strong push

toward reducing the total capital and operating costs of base stations.

With the SC1905, the complex signal processing is done in the RF domain. This results in a simple system-on-chip that

offers wide signal bandwidth, broad frequency of operation, and very low power consumption. It is an elegant solution

that reduces development costs and speeds time to market. Applicable across a broad range of signals—including 2G,

3G, 4G, 5G wireless, and other modulation types—the powerful analog signal-processing engine is capable of linearizing

the most efficient power amplifier topologies. The SC1905 is a true RFin and RFout solution, supporting modular power

amplifier designs that are independent of the baseband and transceiver subsystems. The SC1905 delivers the required

efficiency and performance demanded by today’s wireless systems.

SC1905

698MHz to 3800MHz RF Power Amplifier Linearizer

(RFPAL)

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