Application-specific integrated circuit and measurement transmitter having such a circuit

Patent metadata

Field	Value
Publication number	US-9898193-B2
Application number	US-201314372482-A
Country	US
Kind code	B2
Filing date	Jan 21, 2013
Priority date	Jan 23, 2012
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

An application-specific integrated circuit comprises: analog inputs having analog-digital converters; at least one digital signal processor, which has input registers and output registers. The analog-digital converters sample and digitize input signals S i with sampling frequencies f Si and forward the digitized signals SD i with output frequencies f SD-out-i to the input registers of the digital signal processor. The digital signal processor processes the digitized signals SD i to m processed signals SP j and forwards such to the output registers of the digital signal processor. The digital signal processor has a clock frequency, wherein, furthermore, the signals of the output registers can be output, respectively read-out, with an output frequency. One or more of the frequencies is, respectively, variable, wherein especially one or more of the frequencies, respectively, variable independently of the others of the frequencies.

First claim

The invention claimed is:

1. An electronic circuit, especially an integrated circuit, especially an application-specific integrated circuit, comprising:
n analog inputs having analog-digital converters, wherein n>=1; and
at least one digital processor, especially a digital signal processor, which has input registers and output registers, wherein:
said one or more analog-digital converters sample and digitize input signals S i (which depend on present values of measured variables) with sampling frequencies f Si and forward said digitized signals SD i with output frequencies f SD-out-i to said input registers of the digital signal processor;
said digital signal processor processes the digitized signals SD i to m processed signals SP j and forwards such to said output registers of said digital signal processor, said digital signal processor has a clock frequency f DSP ;
m>=1, and j=1, . . . , m;
furthermore, the signals SP j of said output registers can be output, respectively read-out, with an output frequency f SP-out-j ;
one or more of the frequencies f SD-out-i , f DSP , f SP-out-j are, variable independently of the others of said frequencies;
said one or more frequencies depends, at least on at least one of said digitized measurement signals SD i or on a variable dependent thereon; and
said one or more frequencies f DSP , f SP-out-j depends, on the standard deviation of said at least one digitized measurement signal SD i or a variable dependent thereon.

2. The application-specific integrated circuit as claimed in claim 1 , wherein:
said one or more frequencies f SD-out-i , f DSP , f SP-out-j depends, on the time derivative and/or on another function dependent on the time behavior of said at least one digitized measurement signal SD i .

Assignees

• Endress Hauser Gmbh Co Kg
• Endrss + Hauser Gmbh + Co Kg

Inventors

• Karweck Lars
• Spitz Andreas
• Boulenger Yves
• Wagner Richard
• Winter Klaus
• Zieringer Thomas

Classifications

• G06F1/324

  by lowering clock frequency · CPC title

• G01F1/34

  by measuring pressure or differential pressure · CPC title

• G06F3/05 Primary

  Digital input using the sampling of an analogue quantity at regular intervals of time {, input from a/d converter or output to d/a converter} · CPC title

• H03M1/1255

  Synchronisation of the sampling frequency or phase to the input frequency or phase · CPC title

• G01F23/14

  by measurement of pressure · CPC title