Load limiting circuit and method for limiting the output impedan

Details Load limiting circuit and method for limiting the output impedan Load limiting circuit and method for limiting the output impedan

1998-09-15

2000-05-16

Lee, Benny

Amplifiers

With semiconductor amplifying device

Including gain control means

330298, H03G 310

Patent

active

060642661

ABSTRACT:
A load limiting circuit (56) and method for limiting the output impedance seen by an amplifier (12), wherein a load limiting impedance (64), preferably a resister (94), is selectively coupled in parallel with the output impedance by a switch circuit (62), when a threshold detect circuit (60) detects the value of the output impedance (48) rising above a predetermined value. The output impedance is preferably measured by monitoring the output current through a resistor (70) connected in series with the output impedance (48).

REFERENCES:
patent: 3904971 (1975-09-01), Delagrange
patent: 4013925 (1977-03-01), Tice et al.
patent: 4270159 (1981-05-01), Buckle
patent: 4301490 (1981-11-01), Nagel et al.
patent: 5936470 (1999-08-01), Stroud

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