User manual

page 21
Analog System Lab Kit PRO
experiment 1
1.4 What should you submit 1.5 Other related ICs
Figure 1.9: Instrumentation Ampliers with (a) three
and (b) two operational ampliers
Table 1.1: Plot of Peak to Peak amplitude of output Vpp w.r.t. Input frequency
Table 1.2: Plot of Magnitude and Phase variation w.r.t. Input Frequency
Table 1.3: Plot of DC output voltage and phase variation w.r.t. DC input voltage
Submit the simulation results for Transient response, Frequency response and
DC transfer characteristics.
Take the plots of Transient response, Frequency response and DC transfer
characteristics from the oscilloscope and compare it with your simulation
results.
Apply square wave of amplitude 1V at the input. Change the input frequency
and study the peak to peak amplitude of the output. Take the readings in
Table 1.1 and compute the slew-rate.
SpecicICsfromTexasInstrumentswhichcanbeusedasinstrumentationAmpliers
are INA114, INA118 and INA128. Additional ICs from Texas Instruments which can
be used as general purpose OP-Amps are OPA703, OPA357, etc. See CHAPTER 2,
EXPERIMENT 1.
1
2
3
4
5
R
R
nR
V1
V2
R
R
R
R
VO
R
R
V1
R
nR
R
V2
VO
Frequency Response - Apply sine wave input to the system and study the
magnitude and phase response. Take your readings in Table 1.2.
DCtransferCharacteristics-VarytheDCinputvoltageandstudyitseecton
the output voltage. Take your readings in Table 1.3.
S. No. Input Frequency Peak to Peak Amplitude of output (Vpp)
1
2
3
4
S. No. Input Frequency Magnitude Variation Phase Variation
1
2
3
4
S. No. DC Input Voltage DC Output Voltage Phase Variation
1
2
3
4
Datasheets of all these ICs are available at http://www.ti.com.
An excellent reference about operational ampliers is the “Handbook of
Operational Amplier Applications” by Carter and Brown [5].
Further Reading