Abstract: A transistor in which the emitter terminal is coupled to ground through an electrolytic capacitor. The electrolytic capacitor has a capacitance of from about 0.2 .mu.f to about 100 .mu.f and can be connected either by itself or in parallel with a resistor, depending upon the circuit in which it is used. The incorporation of an electrolytic capacitor of such a capacitance level provides greatly improved gain and less distortion of the input signal, to permit a high output to be achieved in fewer amplifier stages and with less current draw and heating than in conventional transistor amplifier stage circuits. Additionally, the transistor can be provided in a unitary structure by incorporating the electrolytic capacitor directly on the transistor chip, and can also be provided by incorporating the transistor and a resistor within the casing of an electrolytic capacitor.

Abstract: A fuse checker particularly adapted for use with miniature, plug-in fuses for testing the fuses while the fuses are in operative position in an electrical circuit. The checker includes a housing from which extend a pair of parallel contact points adapted for engagement with terminal tabs that lie within terminal access openings in a fuse housing. A ground lead is provided for completing the circuit, which includes a pair of light emitting diodes that have their lenses positioned to form part of the surface of a checker housing. A separate, current limiting resistor is applied between a respective LED and one of the contact points and the ground lead. The checker housing can be a hollow structure or it can be solid, to fully encapsulate the circuit elements that are positioned within the housing.

Abstract: A transistor in which the emitter terminal is coupled to ground through a filter capacitor. The filter capacitor has a capacitance of from about 0.2 .mu.f to about 22 .mu.f and can be connected either by itself or in parallel with a resistor, depending upon the circuit in which it is used. The incorporation of a filter capacitor of such a capacitance level provides greatly improved gain and less distortion of the input signal, to permit a high output to be achieved in fewer amplifier stages and with less current draw and heating than in conventional transistor amplifier stage circuits. Additionally, the transistor can be provided in a unitary structure by incorporating the filter capacitor directly on the transistor chip, and can also be provided by incorporating the transistor and a resistor within the casing of a filter capacitor.