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Lab 11 - Physics Department, Princeton University
Lab 11 - Physics Department, Princeton University

Circuit Construction Kit – Sample problems solved ∆V = iR = R
Circuit Construction Kit – Sample problems solved ∆V = iR = R

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... larger compared with the source is represented by a Thevenin’s equivalent in its input circuit and a resistance Rs (Ri>> Rs), then Vi  Vs. Norton’s equivalent in its output circuit. If the external load resistance RL is smaller compared with the output resistance Ro of the amplifier (Ro>> RL), then ...
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HMC487LP5 / 487LP5E
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< 1 ... 603 604 605 606 607 608 609 610 611 ... 696 >

Valve RF amplifier



A valve RF amplifier (UK and Aus.) or tube amplifier (U.S.), is a device for electrically amplifying the power of an electrical radio frequency signal.Low to medium power valve amplifiers for frequencies below the microwaves were largely replaced by solid state amplifiers during the 1960s and 1970s, initially for receivers and low power stages of transmitters, transmitter output stages switching to transistors somewhat later. Specially constructed valves are still in use for very high power transmitters, although rarely in new designs.
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