Jin-Su Ko

A Low-Power CMOS SAW-Less Quad Band WCDMA/HSPA/HSPA+/1X/EGPRS Transmitter

In this paper we present a multi-band CMOS transmitter for cellular applications. The transmitter covers a wide range of frequency bands and it is designed to minimize power consumption in order to increase handset talk-time. The output noise performance allows the removal of SAW for certain W-CDMA and CDMA bands; moreover it can be configured to be used for SAW-less GSM/EDGE operations while maintaining an excellent linearity.

A single-chip quad-band GSM/GPRS transceiver in 0.18 /spl mu/m standard CMOS

A 0.18 /spl mu/m CMOS single-chip fully integrated quad-band GSM/GPRS transceiver is presented. The low-IF receive section achieves -110dBm sensitivity at the antenna and -15dBm IIP3. The offset-frequency PLL transmitter achieves 1.2/spl deg/ rms phase noise, -65dBc modulation mask at 400kHz, and -165dBc/Hz noise at 20MHz. The chip occupies 17mm/sup 2/ and dissipates 95mA/112mA in receive/transmit mode.

Single-chip RF CMOS UMTS/EGSM transceiver with integrated receive diversity and GPS

The large commercial success of multiband multimode 3rd-generation cellular products has driven single-chip integration, SAW-filter reduction and low power consumption. State-of-the-art solutions require quad-band EGSM combined with multiband WCDMA/HSPA receiver diversity and integrated GPS. Compact form factors make single-chip SAW-less solutions highly desirable. A Quad-Band GSM/EDGE-only transceiver was published in [1], and Triple-Band WCDMA-only transceiver solutions were published in [2–4]. This work describes the first multiband WCDMA/HSPA/EGPRS single-chip transceiver with GPS and receiver diversity. This device supports UMTS Bands 1,2,3,4,5,6,8,9,10 and GSM/EDGE 800, 900, 1800, 1900MHz Bands. It is implemented in cost-effective 0.18µm RF CMOS technology and uses a reduced number of TX and RX SAW filters.

A low power CMOS SAW-less quad band WCDMA/HSPA/1X/EGPRS transmitter

In this paper we present a multi-band CMOS transmitter for cellular applications. The transmitter covers a wide range of frequency bands and it is designed to minimize power consumption in order to increase hand-set talk-time. The output noise performance allows the removal of SAW for certain W-CDMA and CDMA bands; moreover it can be configured to be used for SAW-less GSM/EDGE operations while maintaining an excellent linearity.