The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 10, 1985
Filed:
Dec. 14, 1982
Walter Kolzer, Vienna, AT;
Wilhelm Reischer, Vienna, AT;
Siemens Aktiengesellschaft, Munich, DE;
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.