G6 - Circuit Components

If the temperature of a carbon resistor is increased, the resistance will change depending on the resistor's temperature coefficient rating.

The main disadvantage of using a conventional wire-wound resistor in a resonant circuit is that the resistor's inductance could detune the circuit.

The type of capacitor often used in power-supply circuits to filter the rectified AC is the electrolytic capacitor. An advantage of an electrolytic capacitor is its high capacitance for given volume.

The primary advantage of ceramic capacitors is their comparatively low cost.

A common name for a capacitor used to absorb transient voltage spikes that is connected across a transformer secondary is suppressor capacitor.

One effect of lead inductance in a capacitor used at VHF and above is that the effective capacitance may be reduced.

ALL of the following are advantages of using a ferrite core with a toroidal inductor:

Minimizing the mutual inductance between two inductors is important to reduce or eliminate unwanted coupling. To minimize their mutual inductance, two solenoid inductors should be placed with their winding axes at right angles to each another.

One effect of inter-turn capacitance in an inductor is that the inductor may become self resonant at some frequencies.

The common name for an inductor used to help smooth the DC output from the rectifier in a conventional power supply is filter choke.

A thermistor is a device having a controlled change in resistance with temperature variations.

The peak-inverse-voltage rating of a rectifier is the maximum voltage the rectifier will handle in the non-conducting direction. The two major ratings that must not be exceeded for silicon-diode rectifiers are peak inverse voltage and average forward current.

When two or more diodes are connected in parallel to increase current handling capacity, the purpose of the resistor connected in series with each diode is to ensure that one diode doesn't carry most of the current.

The approximate junction threshold voltage of a silicon diode is 0.7 volts. The approximate junction threshold voltage of a germanium diode is 0.3 volts.

An advantage of using a Schottky diode in an RF switching circuit as compared to a standard silicon diode is that it has lower capacitance.

The stable operating points for a bipolar transistor that is used as a switch in a logic circuit are its saturation and cut-off regions.

It is often necessary to insulate the case of a large power transistor to avoid shorting the collector or drain voltage to ground.

The following describes the construction of a MOSFET - the gate is separated from the channel with a thin insulating layer.

An FET is a solid state device most like a vacuum tube in its general characteristics.

The control grid of a triode vacuum tube is used to regulate the flow of electrons between cathode and plate. The primary purpose of a screen grid in a vacuum tube is to reduce grid-to-plate capacitance.

The minimum allowable discharge voltage for maximum life of a standard 12 volt lead acid battery is 10.5 volts.

An advantage of the low internal resistance of Nickel Cadmium batteries is their high discharge current.

Nickel Metal Hydride batteries are rechargeable. It is never acceptable to recharge a carbon-zinc primary cell.

A Linear voltage regulator is most often provided as an analog integrated circuit.

CMOS is the most commonly used digital logic family of integrated circuits. An advantage of CMOS Logic integrated circuits compared to TTL logic circuits is low power consumption.

The term ROM means Read Only Memory. When memory is characterized as “non-volatile” it means that the stored information is maintained even if power is removed.

An analog integrated circuit is used as an operational amplifier.

One disadvantage of an incandescent indicator compared to a LED is its high power consumption. An LED is forward biased when emitting light.

A characteristic of a liquid crystal display is that it requires ambient or back lighting.

The term MMIC means Monolithic Microwave Integrated Circuit.

A microprocessor is a miniature computer on a single integrated circuit chip. Two devices in an amateur radio station that might be connected using a USB interface are computer and transceiver.