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*A 300 ohm transmission line is terminated with a standard 50 ohm pure resistive termination. A signal is transmitted on the line. | *A 300 ohm transmission line is terminated with a standard 50 ohm pure resistive termination. A signal is transmitted on the line. | ||
There will be a phase reversal of the reflected signal | There will be a phase reversal of the reflected signal | ||
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Nåværende revisjon fra 3. nov. 2011 kl. 13:58
I faget Instrumentering består deler av evalueringen av en fire-timers prøve, der alle bøker samt Internett er tillatte hjelpemidler. I den forbindelse kan det være greit å ha en oversikt over nettsider med relevant informasjon. Linkene er forsøkt sortert slik pensumlisten er inndelt, enn hvor ulogisk den kan være.
Innhold
Generelt
- Pensumliste våren 2007
- Innsamlede svar på repetisjonsoppgaver våren 2007
- Glossary of Electrical Engineering Terms
- ELFA
Lab-oppgaver
- Lab-oppgave 3 (PID-controller)
Tall i datamaskiner
- Wikipedia: BCD (Se "Packed BCD" for 8421-BCD)
- Wikipedia: Gray code
- ASCII-tabell
- Kalkulator mellom binære, hexadesimale og desimale tall
Flyttall
- Wikipedia: Floating point
- Wikipedia: IEEE floating point standard (Se avsnitt "A more complex example" for fremgangsmåte)
Representasjon av negative tall
- Wikipedia: Exponent bias
- Wikipedia: Two's complement
- Wikipedia: Signed number representations (Bl.a. one's complement)
Støy
- Wikipedia: Ground
- Wikipedia: Electronic noise (Bl.a. liste over støytyper)
Støytyper
Data-konvertering
AD-convertere
- Wikipedia: AD-converter
- Flash-type AD-converter (Se spesielt siste kretstegning som kraftig forenkler Northrop s. 618)
- Wikipedia: Successive Approximation ADC
- Delta-Sigma-ADC
Sampling
- FFT og spektralanalyse i Matlab (siden Matlab er tilgjengelig)
- Sample and Hold
- Wikipedia: Sample and Hold
- Wikipedia: Anti-aliasing
Signaloverføring
Diverse
- Wikipedia: Thermocouple
- Wikipedia: Operational amplifier applications (forskjellige op-amper)
Flervalgsoppgaver
Før evalueringen våren 2007 ble der lagt ut eksempeloppgaver. Under følger et utvalg av disse med svar.
- An anti-alias filter is
Placed berore the input to remove frequencies above the Nyquist limit
- The resolution of a DAC depends on
The number of bits
- A LabVIEW program gives the value of an integer as 65534. You know that this actually is a small negative number, but represented as an unsigned 16-bit integer. The small number is
-2
- In addition to letters and numbers, the 7-bit ASCII code has codes for
Codes for communication control
- If the transfer function of a regulator has poles in the right half plane
The output will increase exponentially with time
- Suppose we have a small signal in the range 0 - 2 mV. It can be amplified by a factor of 1000. We have the choice of two AD converters, one 12 bit with range ± 10V and one 10 bit with range 0 - 5V. Which one has the best resolution?
They are equal
- Thermocouples need zero-point correction because
Their output gives the temperature difference between two junctions
- Shot noise has a frequency dependance that is called
White noise
- One of the following units is not used for magnetic fields:
Henry
- The transmission velocity of a signal on a coaxial line depends mainly on
The dielectric
- Which of these number representations have more than one representation for zero?
Sign + magnitude AND 1-complenent. (there is an error in the question, so it is removed from the test)
- A LabVIEW program is used to read the output of a 12-bit AD converter with range ± 10V. The binary output is available in 2-complement form. By some reason, the program gives the result in hex as C8A. Then the voltage is
-4,33 V
- A 300 ohm transmission line is terminated with a standard 50 ohm pure resistive termination. A signal is transmitted on the line.
There will be a phase reversal of the reflected signal