Wideband CATV amplifier with microprocessor-based slope and gain control

摘要

A broadband amplifier has a microcontroller (20) having tables the entries of which correspond to desired variable slope and gain characteristics of the amplifier. The entries in the tables are derived from known temperature characteristics of a specific amplifier/cable combination; multiple tables are used to support multiple different configurations. The microcontroller (20) retrieves values from the tables based on temperature data supplied thereto via a serial bus; these values are output to digital-to- analog converters which generate slope and gain control signals to control slope and gain compensation circuits in a PIN diode attenuator in the amplifier. <IMAGE>