增大采样保持器跟踪速度的两种改进电路

Two Improved Circuits for Increasing Working Speed of Sample Holders

采样保持器(S/H)广泛应用于数据采集电路中,其跟踪速度极大地影响着采样保持器的精度。为此提出两种简单而实用的改进电路——增大驱动集成运放充电电流的采样保持电路和隔离反相闭环积分型采样保持电路。计算分析表明,这两种电路对于提高采样保持器的跟踪速度是有效的。

Sample holders are widely used in data acquisition circuits.Their working speed plays important roles in the specification of sample/hold.Two simple and practical sample/hold circuits are proposed.One is known as increasing charge afluent circuit of driving integrated operation amplifiers,the other is known as isolating inverse close-loop integral circuit.Through computation and analysis,it is demonstrated that they are very valuable to increasing the working speed of sample holders.