Panasonic Microwave Ovens with Inverters Technical Manual page 45

RESONANT CIRCUIT: (explained in detail in part 3) A coil and capacitor
connected in parallel form a capacitive-inductive resonant circuit. Energy
supplied to the circuit will charge up the capacitor. When the energy supply is
removed, the capacitor discharges through the coil. Current flow through the coil
causes a magnetic field to develop around coil. The magnetic field then collapses
around the coil, self-inducing a current flow in the opposite direction, which then
charges the capacitor in the opposite polarity. Consequently, the capacitor
discharges again, starting the process all over.
SCR: A semiconductor device that is controlled by a gate signal. Normally the
SCR acts as an open switch, but upon application of an appropriate gate signal
to its gate terminal, the SCR instantly switches to a conducting state, becoming
as a closed switch.
SERIES CIRCUIT: An arrangement of electrical devices that are connected so
that the total current must flow through all the devices in order to complete the
circuit.
SHORT CIRCUIT: A low resistance (usually zero ohms) connection across a
voltage source or between two points in a circuit that are of different electrical
potential. A short circuit usually results in excessive and possibly damaging
current flow.
SOLENOID: An electromagnetic coil that contains a movable plunger.
STANDING WAVE: The distribution of waves in a reflective enclosure in which
the waves coincide at maximum and minimum points on a resultant wave that
appears to stand still.
SUBSONIC: Sound waves beyond the lower limits of human audibility.
SYNTHESIZER: See Voice Synthesizer.
TERMINAL: (1) A point to which electrical connections can be made. (2) The
electrical input or output of a circuit or component.
TRIGGER: A short pulse, either positive or negative, which can be used to cause
an electrical function to occur.
TUNING STUB: A rod, screw, or post of conductive material that projects into a
wave-guide for one or more of the following purposes: impedance matching,
producing desired phase relationships, or to minimize reflected energy.
ULTRASONIC: Pertaining to sound waves having a frequency that is generally
above the limits of human audibility.
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