## Electronics (Mike Jaroch)

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### B

#### BEAT-FREQUENCY OSCILLATOR

An additional oscillator used in a receiver when it is receiving a
cw signal. It provides an audible tone [17].

 Keyword(s): BEAT-FREQUENCY OSCILLATOR

#### BEL

The unit that expresses the logarithmic ratio between the input and output of any given component, circuit, or system [16].

 Keyword(s): BEL

#### BETA

The ratio of a change in collector current to a corresponding change in base current when the collector voltage is constant in a common-emitter circuit [7].

 Keyword(s): BETA

#### BEVERAGE ANTENNA

A horizontal, long-wire antenna designed for reception and transmission of
low-frequency, vertically polarized ground waves [10].

 Keyword(s): BEVERAGE ANTENNA

#### BIAS

Difference of potential applied to a vacuum tube or transistor to establish a reference operating level [13].

 Keyword(s): BIAS

#### BIAS CURRENT

Current that flows through the base-emitter junction of a transistor and is adjusted to set the operating point of the transistor [13].

 Keyword(s): BIAS CURRENT

#### BIDIRECTIONAL ARRAY

An array that radiates in opposite directions along the line of maximum

 Keyword(s): BIDIRECTIONAL ARRAY

#### BINARY

(1) A number system that uses a base, or radix, of 2. Two digits (1 and 0) are used in the binary system. (2) Pertaining to a characteristic that involves the selection, choice, or condition in which there are only two possibilities. (3) A bistable multivibrator (flip-flop) is one example of a binary device [13].

 Keyword(s): BINARY

#### BINARY CODE

A method of representing two possible conditions (on or off, high or low, one or zero, the presence of a signal or absence of a signal). Electronic circuits designed to work in such a way that only two conditions are possible [13].

 Keyword(s): BINARY CODE

#### BINARY DIGIT

(1) A character that represents one of the two digits in the number system that has a radix of two. (2) Either of the digits 0 or 1 that may be used to represent the binary conditions of on or off [13].

 Keyword(s): BINARY DIGIT

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