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Power MOSFET
Resistance Welding
Two pieces of metal may be welded together by passing large current of 1000A to 100,000A through these pieces. These pieces force together between the two electrodes of the welding machine.
Wireless Telegraphy
At the transmitter side, when the key is pressed, the telegraph signal current passes through the modulator, where high frequency signal from the osc is also received.
Varactor Diode Modulator
Fig (b) shows the basic concept of a varactor frequency modulator. The L1 and C1 represent the tuned circuit of the carrier oscillator.
Types Of Antennas
Transistor Reactance Modulator
Tone Dialing
Teleprinter
Telephone Set
Telegraphy
Types Of Communication Systems
Communication system may be categorized based on their physical infrastructure and the specifications of the signals they transmit.
TV - Television Transmission
Basic TV transmitter
The basic television Broadcast transmitter block diagram is shown in figure (a).