APPENDIX I GLOSSARY

Neets Module 09-Introduction to Wave-Generators and Wave-Shaping Circuits
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AI-4 RL INTEGRATOR—An RL circuit in which the output is taken from the resistor. SELECTIVITY—The ability of a circuit to discriminate between frequencies. SERIES-FED OSCILLATOR—An oscillator in which dc power is supplied to the amplifier through the tank circuit or a portion of the tank circuit. SERIES LIMITER—The diode is connected in series with the output and the output is taken across the resistor. Either the positive or negative alternation of the input wave is eliminated. SERIES-NEGATIVE LIMITER—The diode is connected in series with the output and the output is taken across the resistor. Eliminates the negative alternation of the input wave. SERIES-PARALLEL CIRCUIT—A circuit in which two or more parallel or series combinations are in series with each other. SERIES-POSITIVE LIMITER—The diode is connected in series with the output and the output is taken across a resistor. Eliminates the positive alternation of the input wave. SERIES-RESONANT CIRCUIT—A resonant circuit in which the source voltage is connected in series with a capacitor and an inductor (also in series) to furnish a low impedance at the frequency at which the circuit is resonant. SHAPING CIRCUIT—A circuit which alters the shapes of input waveforms. STEP-BY-STEP-COUNTER—A counter which provides an output for each cycle of the input in one- step increments. SHUNT-FED OSCILLATOR—An oscillator which receives its dc power for the transistor or tube through a path both separate from and parallel to the tank circuit. TANK CIRCUIT—A tuned circuit used to temporarily store energy. Also referred to as a parallel- resonant circuit. TICKLER COIL—Small coil connected in series with the collector or plate circuit of a transistor or tube and inductively coupled to a base or grid-circuit coil to establish feedback or regeneration. TIME CONSTANT—Time required for an exponential quantity to change by an amount equal to .632 times the total change that can occur. TRIGGER—Short pulse, either positive or negative, which can be used to cause an electrical function to take place. TUNED CIRCUIT—Circuit consisting of inductance and capacitance which can be adjusted for resonance at a desired frequency. UPPER-FREQUENCY CUTOFF—The highest frequency a circuit can pass.

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