Signal processor

Details Signal processor Signal processor

1991-09-24

1993-04-06

Ng, Jin F.

Electrical audio signal processing systems and devices

Including amplitude or volume control

381106, 381 98, 381 94, 333 28T, 330284, 330145, H03G 300

Patent

active

052010090

ABSTRACT:
An operational amplifier (1) and resistors (11) and (12) damp an input signal (V.sub.1) by -6dB. Since a positive input terminal of the operational amplifier (1) is fixed at -3V, DC component of the input signal (V.sub.1) is down-shifted to -3V so that a signal (V.sub.2) is obtained. The signal (V.sub.2) is inputted to an electronic volume (100) wherein the signal (V.sub.2) is damped thereby a signal (V.sub.3) is obtained. An operational amplifier (2) and resistors (13) and (14) amplify the signal (V.sub.3) by 6dB. Since a positive input terminal of the operational amplifier (2) is fixed at OV, DC component of the signal (V.sub.3) is up-shifted to OV thereby a signal (V.sub.5) is obtained. The signal which is to be processed in the electronic volume has only a half voltage relative to that of the input signal.

REFERENCES:
patent: 4731851 (1988-03-01), Christopher
patent: 4736426 (1988-04-01), Kinoshita et al.
patent: 4899150 (1990-02-01), Iwamatsu
Radio Shack-"Linear Data Book" Cat. No. 62-1372 1976 National Semiconductor Corp. pp. 10-28, 10-32.

Affiliated with

Also associated with

Rating

Signal processor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Signal processor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal processor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-542401