Title:
結合型零入力電流及びコモンモード制御を有するクラスAB増幅器回路
Document Type and Number:
Japanese Patent JP4903082
Kind Code:
B2
Abstract:
It is an object of the present invention to provide an amplifier circuit that supplies a differential output signal (Voutp-Voutn) with a stable common mode potential (1/2 x (Voutp+Voutn)) and a stable amplification characteristic. An essential feature of the invention is a control path (24, 26, 30, 28, 36, 38, 34, 32) feeding back into a control stage of the amplifier circuit for the combined control of the quiescent currents that flow through the output transistors (T1-T4), and of the common mode potential of the differential output signal. By means of this combination of two control functions in one and the same control path (24, 26, 30, 28, 36, 38, 34, 32) any coupling between separate control loops is avoided.
Inventors:
Christian Ebner
Application Number:
JP2007131521A
Publication Date:
March 21, 2012
Filing Date:
May 17, 2007
Export Citation:
Assignee:
National Semiconductor Germay AG
International Classes:
H03F3/45
Domestic Patent References:
| JP6510407A | ||||
| JP56044208A |
Foreign References:
| US4963837 |
Attorney, Agent or Firm:
Masaaki Kobashi