PBL40215

Preliminary January 2001 PBL 402 15 PBL 402 15 RF Transceiver circuit for the Digital Enhanced Cordless Telecommunications (DECT) system Description. The PBL 402 15 is a complete RF transceiver to be used in the Digital Enhanced Cordless Telecommunications ( DECT ) system. It is designed to interface to various base-band controllers. The circuit contains transmit and receive functions that share integrated high stability VCO´s and a phase locked loop function ( PLL ). All functionality is controlled through a 3-wire bus interface with optional hard wire lines. The receive section comprises of a low noise image reject down conversion to the first intermediate frequency, an external channel filter, a second down convertion to a second intermediate frequency, an integrated channel pass filter, a high gain limiting amplifier, a received signal strenght indicator with DC compensation loop, a self aligned frequency discriminator and a preamble based data slicer. The transmit section comprises of a signal gate and a pre-power amplifier. Data transmission is achieved by direct open loop modulation of the Tx VCO. Key features. High Tx output power to +7dBm Integrated PLL and high stability VCO´s 3-line serial interface bus Minimum 2.7 V supply voltage Low current consumption Differential Rx input and Tx output Flexible interface to various baseband controllers Exellent performance with Ericsson´s power amplifier PBL403 09 Low cost Applications: DECT Handset and...