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:
Apr. 19, 2011
Filed:
Mar. 23, 2005
Wolfgang Trunzer, Lörrach, DE;
Wolfgang Trunzer, Lörrach, DE;
Endress + Hauser GmbH + Co. KG, Maulburg, DE;
Abstract
A measurement transmitter, including: A microprocessor having a reset input and a clock output for providing a periodic clock signal; a monitoring circuit having a clock signal input and a reset output; and a current controller for issuing in a band range, during operation, a measurement signal current representing a measured value. The clock signal input is connected with the clock signal output and the reset input with the reset output. Upon absence of the clock signal, the reset output periodically issues a reset signal. The measurement transmitter further includes a comparator circuit having a first input, which is connected via a lowpass with the reset output of the monitoring circuit, and a second input, on which a reference voltage is applied. An output of the comparator circuit is connected with the current controller. After repeated output of the reset signal, the voltage at the first input of the comparator circuit moves above the reference voltage, so that a control signal is then present on the output of the comparator. The control signal causes the current controller to issue an error signal outside of the band range.