Evaluering i TFY4190 Instrumentering

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.

Generelt

• Pensumliste våren 2007

Tall i datamaskiner

• Wikipedia: BCD (Se "Packed BCD" for 8421-BCD)
• Wikipedia: Gray code
• ASCII-tabell

Flyttall

• Wikipedia: Floating point
• Wikipedia: IEEE floating point standard

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

• Wikipedia: Shot noise
• Wikipedia: Johnson-Nyquist noise (Termisk støy)
• Wikipedia: White noise

Data-konvertering

• Strøm til spenning ved bruk av inverterende op-amp
• En bra introduksjon til AD-convertering

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

• Wikipedia: Thermocouple

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