Low Power Cellular Jammer is a high quality low power jamming device for mobile communications. The LP cell phone jammer unit is intended for blocking all mobile phone types within designated indoor areas. Its unique design combines effective jamming in a radius between 5-80 meters and strict compliance with international standards of safety & electromagnetic compatibility.
A low-voltage low-power preamplifier is presented. It has been designed for a single supply voltage of /spl plusmn/1.2V, whereas its average power consumption for the complete preamplifier is 4 /spl mu/ watts. It is designed for use with four-terminal MR read and inductive write heads. In read mode, the device consists of a fully differential amplifier, offering; voltage or current bias, voltage-sense input, programma-ble input impedance, low noise and high bandwidth. In write mode, it includes fast current switching dif-ferential write drivers, which support data rates up to 1200 Mb/s. The design is suitable for most applications in portable telephone equipment, portable receivers and hearing aid.