Analog voice scrambler/descrambler

GENERAL DESCRIPTION The PCD4440T is a silicon gate CMOS integrated circuit intended to be used in cordless telephony, radio, and line telecommunications products utilizing a microcontroller for the control functions. The purpose of the device is to prevent unauthorized ‘listening-in’ on conversat

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PHI

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Analog voice scrambler/descrambler

GENERAL DESCRIPTION\nThe PCD4440T is a silicon gate CMOS integrated circuit intended to be used in cordless telephony, radio, and line telecommunications products utilizing a microcontroller for the control functions. The purpose of the device is to prevent unauthorized ‘listening-in’ on conversatio • Scrambler or descrambler function\n• Scrambling in frequency domain\n• Selectable split frequency (up to 10 selections per second)\n• Telephony-band filtering included\n• No increase in bandwidth\n• No external components required\n• Small signal delay\n• Insensitive to distortion and group delay ;

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