Forskjell mellom versjoner av «Evaluering i TFY4190 Instrumentering»
Fra NablaWiki
| Linje 45: | Linje 45: | ||
Legger ut spørsmål med svar. | Legger ut spørsmål med svar. | ||
| − | An anti-alias filter is | + | *An anti-alias filter is |
| − | + | placed berore the input to remove frequancies above the Nyquist limit | |
| − | The resolution of a DAC depends on | + | *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 | + | *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 | + | *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 | + | *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? | + | *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 | + | *Thermocouples need zero-point correction because |
| − | + | Their output gives the temperature difference between two junctions | |
| − | Shot noise has a frequency dependance that is called | + | *Shot noise has a frequency dependance that is called |
| − | + | White noise | |
| − | One of the following units is not used for magnetic fields: | + | *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 transmission velocity of a signal on a coaxial line depends mainly on |
| − | + | The dielctric | |
Revisjonen fra 30. apr. 2007 kl. 13:46
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
Tall i datamaskiner
- Wikipedia: BCD (Se "Packed BCD" for 8421-BCD)
- Wikipedia: Gray code
- ASCII-tabell
Flyttall
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
Diverse
Multichoice spørsmål
Legger ut spørsmål med svar.
- An anti-alias filter is
placed berore the input to remove frequancies 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 dielctric
