L497 HALL EFFECT PICKUP IGNITION CONTROLLER

  
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The LA1061M is an Antenna switching controller for mobile Radio equipment. The LA1061M uses a number of inputs from the receiver circuitry to select the main Antenna or sub-antenna according to signal strength and quality. Weak and strong signals are detected with the S-meter DC voltage and F. E. AGC voltage, respectively. Multi-path distortion is
L497 HALL EFFECT PICKUP IGNITION CONTROLLER - schematic

detected from the AC component of the IF output, using the same high-sensitivity Counter circuit as in Sanyo`s earlier LA1060 device. An auxiliary circuit keeps the main Antenna selected for a fixed time period when reception conditions outside a moving vehicle are changing rapidly. By Sanyo Semiconductor Corporation



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