The CX74061 is a highly integrated super-heterodyne receiver. This single IF, multi-mode, tri-band receiver is intended for use in CDMA phones in PCS, cellular CDMA, AMPS, and GPS modes. Except for the SAW filters and matching components, the device incorporates all the components required to implement the receiver chain, from the LNA to the I/Q demodulator stages. Three LNAs are in the front-end receiver: a three-step gain stage cellular LNA (high, mid, and bypass), a two-step gain stage PCS LNA (high, bypass), and a high gain stage GPS LNA.
An enhanced bidirectional IEEE-488.2/GPIB to serial interface that can be used to adapt devices with RS-232 and RS-485 (RS-422) serial interfaces to the GPIB Bus. A 256 Kbyte RAM buffers up to 252,000 characters and frees the computer for other tasks while the 4894B transparently transfers data to or from the serial device when in the G mode. ...more