STB4395

The STB4395(A) is a fully integrated receivertransmitter designed for CT2 applications, and incorporates all the VCO's, synthesizers, PLLs, and channel select logic, to make a fully functional "single chip" radio.

The STB4395 receiver is of the double superhet architecture and operates from an aerial input (via a SAWfilter) to bitstream output to CT2 format, whilst the transmitter operates from I/Q inputs to +13dBm at the final frequency. A single (external) frequency reference is all that is required to give full coverage over the rangeof 800 to PAis governed internally to give the required switch-on ramp, whilst the output can be swiched from low to high power by means of an external digital control signal.

1000MHz.The on-offslope of theTransmit and allows continuThe channelselect is controlled from a digital serial input, ous channel control from 800 to 1000MHz.

The STB4395 exists in two versions: the STB4395, which has I/ I, Q/Q transmit data input/outputs, is designed to operate with the SGS-THOMSON baseband companion part, the ST5095. The STB4395Ahas a 3 wire I/Q interface and is compatible with commercially available I/Q transmit data baseband IC's.