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Creating additional phase margin in the open loop gain of a negative feedback amplifier system using a boost zero compensating resistor

  • US 7,656,139 B2
  • Filed: 06/18/2007
  • Issued: 02/02/2010
  • Est. Priority Date: 06/03/2005
  • Status: Active Grant
First Claim
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1. A negative feedback amplifier system comprising:

  • a first current control element having a first terminal connected to a supply voltage, a control terminal, and a second terminal connected to an output terminal;

    an output stabilization circuit including;

    a second current control element having a first terminal connected to the voltage supply, a control terminal, and a second terminal, anda first resistor coupled between the second terminal of the second current control element and the output terminal;

    an amplifier having at least one input terminal coupled to the second terminal of the second current control element, the amplifier also having an output terminal connected to the control terminals of the second current control element; and

    a boost zero compensating resistor connected between the output terminal of the amplifier and the input terminal of the first current control element.

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