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Skyworks RF Subsystem


GSM/GPRS RF 子系统

Skyworks GPRS RF 子系统系列由 Skyworks GPRS 收发器和功率放大器产品构成。GPRS RF 子系统产品体积虽小,却能提供高级别的集成。

这些高性能、经过实地检验的 RF 子系统为全球范围的无线终端制造商提供了大幅减少 RF 空间占用的能力,同时还能够大幅降低下一代手持多频 GPRS 设备的能耗。

标准的 GSM/GPRS RF 子系统产品的特性:

  • 无需 IF 滤波器的直接降频接收器
  • 集成的四频 LNA、发送 VCO 与环路滤波器
  • 单集成,完全可编程的小数分频合成器
  • 集成的数字晶体振荡器
  • 四频、多槽 GPRS Class 12 操作
  • 支持 GPRS 和下行链路 EDGE 标准
  • 直接转换架构,无需 IF 转换级
  • 兼容 Skyworks 基频设备和多种第三方基频设备

GPRS RF 子系统产品包括:

  • SKY74963 DCR™ 收发器 + SKY77500 前端模块 - 直接转换设备与收发前端模块接合,并可兼容所有 GSM/EGPRS 基频。
  • CX74063 DCR™ 收发器 + SKY77500 前端模块 - 直接转换设备与收发前端模块接合,并可兼容所有 GSM/EGPRS 基频。

SKY74963-23

RF Transceiver w/Power Ramping Controller and Integrated Cryst Osc for Multi-Band GSM/GPRS/EDGE Apps

The SKY74963 RF transceiver is a highly integrated device for multi-band Global System for Mobile Communications (GSM) or General Packet Radio Service (GPRS) applications. The device requires a minimal number of external components to complete a GSM radio subsystem. The SKY74963 supports GSM850, EGSM900, DCS1800, and PCS1900 applications. The receiver also supports Enhanced Data for GSM Evolution (EDGE) downlink applications.

The receive path implements a direct down-conversion architecture that eliminates the need for Intermediate Frequency (IF) components. The SKY74963 consists of three integrated Low Noise Amplifiers (LNAs), a quadrature demodulator, tunable receiver baseband filters, and a DC Offset Correction (DCOC) sequencer.

In the transmit path, the device consists of an In-phase and Quadrature (I/Q) modulator within a frequency translation loop designed to perform frequency up-conversion with high output spectral purity. This loop also contains a phase-frequency detector, charge pump, mixer, programmable dividers, and high power transmit Voltage Controlled Oscillators (VCOs) with no external tank required. With the integrated gain controller (and an integrator ), the device realizes the Power Amplifier Control (PAC) functionality when combined with a coupler, a Radio Frequency (RF) detector, and a Power Amplifier (PA).

The SKY74963 also features an integrated, fully programmable, sigma-delta fractional-N synthesizer suitable for GPRS multi-slot operation. Except for the loop filter, the frequency synthesizer function, including a wideband VCO, is completely on-chip. The reference frequency for the synthesizer is supplied by the integrated crystal oscillator circuitry.

CX74063

RF Transceiver With Power Ramping Controller and Integrated Crystal Oscillator With 13 MHz Output for Multi-Band GSM, GPRS, and EDGE Applications

The CX74063 transceiver is a highly integrated device for multiband Global System for Mobile Communications (GSM) or General Packet Radio Service (GPRS) applications. The device requires a minimal number of external components to complete a GSM radio subsystem. The CX74063 supports GSM850, EGSM900, DCS1800, and PCS1900 applications. The receiver also supports Enhanced Data for GSM Evolution (EDGE) downlink applications.

The receive path implements a direct down-conversion architecture that eliminates the need for Intermediate Frequency (IF) components. The CX74063 receiver consists of three integrated Low Noise Amplifiers (LNAs), a quadrature demodulator, tunable receiver baseband filters, and a DC Offset Correction (DCOC) sequencer.

In the transmit path, the device consists of an In-phase and Quadrature (I/Q) modulator within a frequency translation loop designed to perform frequency up-conversion with high output spectral purity. This loop also contains a phase-frequency detector, charge pump, mixer, programmable dividers, and high power transmit Voltage Controlled Oscillators (VCOs) with no external tank required. With the integrated gain controller (and an integrator ), the device realizes the Power Amplifier Control (PAC) functionality when combined with a coupler, a Radio Frequency (RF) detector, and a Power Amplifier (PA).

The CX74063 also features an integrated, fully programmable, sigma-delta fractional-N synthesizer suitable for GPRS multi-slot operation. Except for the loop filter, the frequency synthesizer function, including a wideband VCO, is completely on-chip. The reference frequency for the synthesizer is supplied by the integrated crystal oscillator circuitry.

The CX74063 is available as a 56-pin, RFLGA 8 x 8 mm package with either a circular ground pad or a four-quadrant ground pad.

SKY77500

TX-RX iPAC FEM Quad-Band GSM/GPRS GSM850, GSM900, DCS1800, PCS1900

The SKY77500 incorporates separate GSM850/900 and DCS1800/PCS1900 PA blocks that share a common power supply input for current distribution. Impedance-matching circuitry for 50 Ω input/output and a PA bias control block are also incorporated. Internal decoder circuitry controls the RF switches and provides a low current external control interface. The SKY77500 is packaged in a 32-pin, 8 x 10 mm Multi-Chip Module (MCM) package.

vendor: http://www.skyworksinc.com/

sheet: SKY74963.pdf, CX74063.pdf, SKY77500.pdf


 
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