Multi-Mode Transmitters in CMOS

This paper both describes a multi-mode modulator for cellular 2.5, 3 and 4G applications and a multi-mode transmitter for connectivity standards like Bluetooth (BT), Zigbee and WLAN. Both multi-mode transmitters are implemented in deep submicron CMOS technology and demonstrate the use of digital techniques and innovative analogue circuit topologies for obtaining high efficiency and excellent performance. The two multi-mode transmitters have different architectures as their target applications impose different performance requirements.