Circuit arrangement for an alternating control

Details Circuit arrangement for an alternating control Circuit arrangement for an alternating control

1982-12-14

1985-09-10

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

'reset' systems

318610, 318624, G05B 1136

Patent

active

045409269

ABSTRACT:
In a circuit arrangement for an alternating control a PI controller comprises a first operational amplifier having an output connected via a resistor to the non-inverting input of a second operational amplifier wired as an impedance transformer. The output of the second operational amplifier is fed back via an RC stage to the inverting input of the first operational amplifier. The output of a second controller is connected via a decoupling diode to a junction between the decoupling resistor and the non-inverting input of the second operational amplifier. Positive as well as negative signals can occur at the output of the first operational amplifier, and discontinuities in control during a switch over between the two controllers are avoided.

REFERENCES:
patent: 4338559 (1982-07-01), Blaschke et al.
Howard V. Malmstadt et al., "Digital and Analog Data Conversions", W. A. Benjamin 1973, pp. 25, 26, 28, 29.
D. Ernst-D. Strole, "Industrieelektronik", 1973, pp. 62-96, Springer Verlag, New York.

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