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Integrated Circuit Amplifier
An integrated circuit amplifier is a compactly packaged collection of active and passive devices that may boost the voltage or current level of a signal. The active components are transistors, three-terminal semiconductor devices that are capable of current gain, wherein a small change in current produces a pro-rated change in the integrated circuit amplifier output.
IC Design Philosophy
More and more electronics circuits are integrated in a single chip
· More complicated functions
· Smaller size and lower cost
· Suitable for mass-production
Implementation cost depends on device area rather than device count
· Large/moderate-value resistors should be avoided
· Larger/moderate-value capacitors should be avoided
· Preferable to use transistors due to chip-area consideration
· The design philosophy for ICs is different from that of discrete-component circuits Realize as many of functions as possible by using transistors only
· Rely on device matching or size ratios for circuit design
· Active loads are typically used for amplifier designs
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