Reduction of intermodulation

Details Reduction of intermodulation Reduction of intermodulation

1976-02-09

1977-06-28

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

250552, 307200A, H03K 342

Patent

active

040328023

ABSTRACT:
A low distortion modulated light source, including a light emitting diode and a compensating diode. These diodes are arranged in parallel for D.C. biasing, and in anti-series with respect to the A.C. signal path. Means are provided for varying the relative biasing of the two devices so as to thereby adjust the A.C. characteristics of the compensating diode to more accurately correspond to the A.C. characteristics of the light emitting diode.
When properly biased, the inherently non-linear junction capacitance of the light emitting diode is compensated so as to substantially eliminate undesired harmonics and intermodulation products.

REFERENCES:
patent: 3432670 (1960-03-01), Dym
patent: 3462605 (1969-08-01), Engeler
patent: 3665442 (1972-05-01), Brooks
patent: 3795821 (1974-03-01), Ichiyanagi

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