Assertion: transistor | /r/ObjectUse | used in the past
Facets:
value: up until they were replaced
type: TEMPORAL
value: commonly
type: TEMPORAL
Source sentences:
text: Bipolar junction transistors were also commonly used in the past, up until they were replaced by power MOSFETs, particularly LDMOS transistors, as the standard technology for RF power amplifiers by the 1990s, due to the superior RF performance of LDMOS transistors.