general/frequency

Number of occurrences or cycles per unit time

Braille alphabet used in the US before the adoption of standardized English braille

Electronic device

Number of occurrences in an experiment or study

Estimate of the spectral density of a signal

Signal representation

Frequency mixer of a superhet radio

Type of demodulator

Specific figure of merit in electronics

Electronic amplifier that varies its gain depending on a control voltage

Type of electronic circuit