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topcat123
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Homework Statement
1.
a) Contrast the relative performance of each op-amp in terms of these parameters and state how they compare to that of the ideal op-amp.
b) TABLE B gives two descriptions of operational amplifiers. State, with justifications, which description most closely matches the op-amps of TABLE A.
c) State, with reasons, which op-amp in TABLE A would be most suitable for the applications listed in TABLE C.
d) TABLE D shows the internal circuitry of two op-amps. Identify, with justification, which op-amp circuit is most likely to belong to which op-amp in TABLE A.
Table B
Description 1
A low cost, high speed operational amplifiers with an internally trimmed input offset voltage (BI-FET IITM technology). They require low supply current yet maintain a large gain bandwidth product and fast slew rate. In addition, well matched high voltage input devices provide very low input bias and offset currents.
Description 2
A dual amplifier for the amplification of low level signals in applications requiring optimum noise performance. Each of the two amplifiers is completely independent, with individual internal power supply decoupler-regulator, providing 120 dB supply rejection and 60 dB channel separation. Other outstanding features include high gain (112 dB), large output voltage swing and wide power bandwidth. The amplifier operates from a single supply across a wide voltage range. The amplifier is internally compensated with the provision for additional external compensation for narrow band applications
Table C
Application 1 Fast D/A converters.
Application 2 Audio pre-amplifier.
Homework Equations
None
The Attempt at a Solution
a)
The ideal op-amp will have infinite input resistance, zero output resistance and infinite gain
The two op-amps compare to this below.
Op-amp A has an input resistance of 200kΩ, an output resistance of 150Ω and a gain of
160,000 V/V
Op-amp B has an input resistance of 1TΩ, an output resistance of 10Ω and a gain of
300,000 V/V
b)?
c)
I think A because of the fast slew rate and because of the 15mhz band width.
d)?
Any help would be appreciated.
Thanks