Digital data level control circuit

Details Digital data level control circuit Digital data level control circuit

1996-12-12

1998-08-11

Young, Brian K.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

H03M 166

Patent

active

057933200

ABSTRACT:
A digital data level control circuit adopting a digital-to-analog conversion control mode is provided, in which a capacitor for removing popcorn (POP) noise is used towards an output end of a digital-to-analog converter portion and switching of a controller is controlled by a microcomputer to perform a desired level control, thereby effectively removing the POP noise. The digital data level control circuit includes a digital-to-analog converter portion for converting the digital data into analog data, a controller connected to an output end of the digital-to-analog converter portion, for controlling the level of the analog-converted data, and an out level control portion connected to one end of the controller, for smoothly controlling the level of the analog-converted output from the digital-to-analog converter portion. The output level control device as a capacitor controls the level of the output thereof by a time constant obtained from the resistance of a resistor and the capacitance of the capacitor within the controller.

REFERENCES:
patent: 5355134 (1994-10-01), Kasuga et al.

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