Phanton-powered active direct box

Details Phanton-powered active direct box Phanton-powered active direct box

1998-08-11

2000-02-01

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including particular power supply circuitry

381120, H03F 304

Patent

active

060207884

ABSTRACT:
An active direct box comprising an electronic circuit for receiving an unbalanced, high-impedance format audio signal input, and for providing a balanced, low-impedance audio signal output, compatible with common audio system components such as audio consoles and recorders. The direct box circuit receives power from a phantom power source supplied by the audio system component to which the direct box is connected. The phantom power source is isolated, and used to provide a bias supply to a pair of JFET operational amplifiers in the electronic circuit which convert the audio signals, and which provide for both signal gain and signal reduction. A negative feedback system is further employed to covert the input audio signals to a low-impedance format with a minimal introduction of signal distortion.

REFERENCES:
patent: 4270151 (1981-05-01), Steinmaier
patent: 4567608 (1986-01-01), Watson et al.
patent: 4737735 (1988-04-01), Kampes
patent: 5343159 (1994-08-01), Butler
patent: 5459792 (1995-10-01), Reichel et al.
patent: 5596648 (1997-01-01), Fast
patent: 5612646 (1997-03-01), Berning
patent: 5731536 (1998-03-01), Kelsey

Affiliated with

Also associated with

Rating

Phanton-powered active direct box does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Phanton-powered active direct box, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phanton-powered active direct box will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-940805