TriQuint introduces SiGe dual-band CDMA cellular phone transmitter

October 23, 2001 – Hillsboro, OR – TriQuint Semiconductor Inc. has introduced the TQ7M35 Tri-mode, dual-band transmitter for CDMA/PCS/AMPS phones.

The TQ7M35 is a one-chip solution that integrates all transmit functions from the analog base-band output to the power amplifier input, the company said. When combined with the TQM7136 and TQM7636 power amplifier modules it provides a complete CDMA tri-mode, dual-band transmit solution targeted for the growing US CDMA marketplace, according to TriQuint.

This is the first transmitter product announced by TriQuint’s and Atmel’s CDM A345TM joint development project. The complex functionality and RF performance were achieved utilizing Atmel’s low cost, leading-edge SiGe semiconductor process.

The TQ7M35 maximizes phone talk time by offering low overall current consumption and the capability to selectively power-up individual circuit blocks, according to the companies. The RF performance – linearity, output power, and dynamic range – exceeds the requirements of the IS-95 standard simplifying the design-in process. Specifically, the high output power, linearity, and dynamic range of the TQ7M35 achieved using Atmel’s SiGe BiPolar process technology enables a lower cost transmit solution by easing the stringent requirements on downstream components, the companies said. An on-chip auxiliary phase-locked loop with an active voltage-controlled-oscillator and a simple 3-wire, 4-bit serial bus interface for selecting TQ7M35 operating modes greatly simplifies the design-in process.

Strategic customer sampling has commenced and will continue through the scheduled start of high volume manufacturing release in 4Q01. This CDMA transmitter is part of the CDMA product series being developed as part of the CDMA345TM joint development project with Atmel. The technology behind the CDMA345 TM product family has evolved through years of R&D and custom product development in the RF marketplace by both TriQuint and Atmel, and through the collaborative efforts of TriQuint and Atmel to jointly develop integrated circuit technology for the CDMA marketplace.


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