WIDEBAND CATV AMPLIFIER WITH MICROPROCESSOR-BASED SLOPE AND GAIN CONTROL,申请号CA19982257617-传众专利搜索

WIDEBAND CATV AMPLIFIER WITH MICROPROCESSOR-BASED SLOPE AND GAIN CONTROL

申请公布号：CA2257617(A1)

申请号：CA19982257617

申请日期：1998.12.30

申请公布日期：1999.07.02

申请人：

THOMAS & BETTS INTERNATIONAL, INC.

发明人：BLOUNT, RICHARD J., JR.;UNDERKOFLER, LEON M.

分类号：H04N5/14;H03F1/30;H03F1/32;H03F3/62;H03G3/30;H04N7/10;H04N7/26;(IPC1-7):H03F1/42;H03F3/19;H04N7/16

主分类号：H04N5/14

摘要：A broadband amplifier has a microcontroller 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 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.