Assertion: amplifier's switch | /r/HasProperty | done 120 hz
Facets:
value: from few kilohertz
type: OTHER
value: in a lamp dimmer
type: LOCATION
value: into hundreds
type: OTHER
Source sentences:
text: Typically switching has to be done several times a minute in an electric stove, 120 Hz in a lamp dimmer, from few kilohertz (kHz) to tens of kHz for a motor drive and well into the tens or hundreds of kHz in audio amplifiers and computer power supplies.