Fast-response current limiting

Details Fast-response current limiting Fast-response current limiting

2007-03-27

2007-03-27

Choe, Henry (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including protection means

C330S252000

Reexamination Certificate

active

11137047

ABSTRACT:
An amplifier (10″) has a first amplifier stage (14) for producing a control current (IX) in response to an input voltage. A second amplifier stage (16) has first (46) and second (38) transistors. The first transistor (46) is coupled to receive the control current (IX) and is operable to produce a control voltage. The second transistor (38) is coupled to receive the control voltage and operable to produce an output current. A nonlinear resistive element (50) is coupled to the first transistor (46) to add a nonlinear function of the control current (IX) to the control voltage. The nonlinear resistive element (50) may include a third transistor connected between the first transistor (46) and a reference potential, operable to receive the control current (IX) and to generate the nonlinear function thereof.

REFERENCES:
patent: 6538513 (2003-03-01), Godfrey et al.
patent: 6559719 (2003-05-01), Sakuragi
patent: 6741130 (2004-05-01), Wey et al.

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