A universal compensation scheme for active filters

A finite gain-bandwidth product, of the operational amplifier restricts the use of active filters to low frequencies. Knowing the gain-bandwidth product of the operational amplifier and its variations with respect to the bias voltages and temperature, the high frequency performance of the filters can be, exactly predicted. Suitable compensation schemes can then be incorporated in these circuits to stabilize their high frequency performance against variations in the bias voltages and temperature. Variations in the performance factors due to the amplifier pole are studied for a few active RC filters. A compensation scheme is suggested which results in an extension of the useful frequency range of operation of these circuits. © 1977 Taylor and Francis Group, LLC.