Regulating amplifier for thyristor-driven EM vibrators - has operational amplifier summing voltages to minimise effect of voltage fluctuations

摘要

The regulating amplifier circuit ensures operation independent of the supply voltage variation. The amplifier circuit is based upon an operational amplifier with passive feedback elements to provide any combination of proportional, integral and derivative operation. The output voltage is given the formula: R5/R1 times UW-R5/R2 times UX +R5/R3 times U1+R5/R4 times UB, where UX is the actual voltage, UW the reference voltage, U1 the non-stabilized supply voltage and UB the regulated voltage.