Dynamic amplifier circuit

Details Dynamic amplifier circuit Dynamic amplifier circuit

H - Electricity

03

F

330/106

H03F 3/72 (2006.01) H03F 3/00 (2006.01) H03H 19/00 (2006.01)

Patent

CA 1192277

11 ABSTRACT: In a dynamic amplifier circuit, which can specifically be used in switched capacitor filter cir- cuits, a current source supplies a bias current to the amplifier. At the beginning of the amplifying period the bias current is high to obtain a high speed of amplifi- cation and at the end of the amplifying period the bias current is small to obtain a high gain and high accuracy. An undefined value of the bias current at the end of the amplifying period may give rise to incorrect operation of the amplifier circuit. According to the invention this problem is avoided by including an additional bias cur- rent source which defines the minimum bias current in the amplifier circuit.

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