Multi Channel Anti Jam RFASIC

The proposed part is a 4-Channel, Low Power, High Anti-Jam RF ASIC, which is being designed as an upgrade for the Defense Advanced Global Positioning System Receiver (DAGR) developed by Rockwell Collins, and similar handhelds. It will support 30 dB of broadband jammer cancellation allowing GPS tracking with up to 100 dB J/S. The chip will have four parallel channels with a common local oscillator (LO) and image rejection mixers for the first downconverters. Each downconverter can be used for high side or low side mixing permitting simultaneous L1 and L2 operation or all channels on the same frequency. The High A/J RF ASIC will use differential circuitry throughout and balanced off chip filters at both the first IF and second IF or baseband as dictated by the digital receiver interface. The chip will use programmable LO and sample clock synthesizers to accommodate different reference frequencies and frequency plans. PI Ray Eastwood (Nu-Trek) is a GPS architect who has designed cutting edge GPS receivers for Raytheon; and Wayne Dietrich (Raytheon) has designed over ninety military ASICs.