Matches in SemOpenAlex for { <https://semopenalex.org/work/W2215699312> ?p ?o ?g. }
Showing items 1 to 61 of
61
with 100 items per page.
- W2215699312 abstract "Modern portable telephones are required to operate for long periods from a small battery pack. This paper reviews previous work and describes a high efficiency (72%) 0.5 watt distributed Class E power amplifier operating at 1 GHz. Class E amplifiers are a type of switching amplifier where the losses normally associated with the 'shorting out' of the device shunt capacitance are negated by designing the load network to define the voltage across the switching device when it is off. These amplifiers unlike class C amplifiers offer the potential of 100% efficiency with a specified output power. To obtain minimum losses the voltage across the switch, when it is off, is arranged to ring and fall back to zero just before the switch turns on again. The design criteria for the voltage are: the voltage rises slowly at switch off; the voltage falls to zero by the end of the half-cycle; and the voltage has a zero rate of change at the end of the half cycle. A typical circuit is shown and it consists of a bias choke, a (transistor) switch, a shunt capacitor which incorporates the parasitic capacitance of the device, a series tuned LCR resonant circuit with an extra series reactance (inductance) which sets the load angle to obtain correct collector voltage waveform." @default.
- W2215699312 created "2016-06-24" @default.
- W2215699312 creator A5081303105 @default.
- W2215699312 creator A5084599148 @default.
- W2215699312 date "1991-12-16" @default.
- W2215699312 modified "2023-09-22" @default.
- W2215699312 title "Highly efficient class E amplifiers" @default.
- W2215699312 hasPublicationYear "1991" @default.
- W2215699312 type Work @default.
- W2215699312 sameAs 2215699312 @default.
- W2215699312 citedByCount "1" @default.
- W2215699312 crossrefType "journal-article" @default.
- W2215699312 hasAuthorship W2215699312A5081303105 @default.
- W2215699312 hasAuthorship W2215699312A5084599148 @default.
- W2215699312 hasConcept C119599485 @default.
- W2215699312 hasConcept C127413603 @default.
- W2215699312 hasConcept C145366948 @default.
- W2215699312 hasConcept C165801399 @default.
- W2215699312 hasConcept C182442803 @default.
- W2215699312 hasConcept C194257627 @default.
- W2215699312 hasConcept C29049376 @default.
- W2215699312 hasConcept C46362747 @default.
- W2215699312 hasConcept C52192207 @default.
- W2215699312 hasConcept C89880566 @default.
- W2215699312 hasConceptScore W2215699312C119599485 @default.
- W2215699312 hasConceptScore W2215699312C127413603 @default.
- W2215699312 hasConceptScore W2215699312C145366948 @default.
- W2215699312 hasConceptScore W2215699312C165801399 @default.
- W2215699312 hasConceptScore W2215699312C182442803 @default.
- W2215699312 hasConceptScore W2215699312C194257627 @default.
- W2215699312 hasConceptScore W2215699312C29049376 @default.
- W2215699312 hasConceptScore W2215699312C46362747 @default.
- W2215699312 hasConceptScore W2215699312C52192207 @default.
- W2215699312 hasConceptScore W2215699312C89880566 @default.
- W2215699312 hasLocation W22156993121 @default.
- W2215699312 hasOpenAccess W2215699312 @default.
- W2215699312 hasPrimaryLocation W22156993121 @default.
- W2215699312 hasRelatedWork W1497476994 @default.
- W2215699312 hasRelatedWork W1543218237 @default.
- W2215699312 hasRelatedWork W1583173771 @default.
- W2215699312 hasRelatedWork W1991379856 @default.
- W2215699312 hasRelatedWork W2048485230 @default.
- W2215699312 hasRelatedWork W2077016460 @default.
- W2215699312 hasRelatedWork W2083151917 @default.
- W2215699312 hasRelatedWork W2087564902 @default.
- W2215699312 hasRelatedWork W2096845533 @default.
- W2215699312 hasRelatedWork W2099369264 @default.
- W2215699312 hasRelatedWork W2122867236 @default.
- W2215699312 hasRelatedWork W2125616441 @default.
- W2215699312 hasRelatedWork W2156844338 @default.
- W2215699312 hasRelatedWork W2162549589 @default.
- W2215699312 hasRelatedWork W2162566706 @default.
- W2215699312 hasRelatedWork W2165911997 @default.
- W2215699312 hasRelatedWork W2170838636 @default.
- W2215699312 hasRelatedWork W2543422588 @default.
- W2215699312 hasRelatedWork W2766246471 @default.
- W2215699312 hasRelatedWork W2949690556 @default.
- W2215699312 isParatext "false" @default.
- W2215699312 isRetracted "false" @default.
- W2215699312 magId "2215699312" @default.
- W2215699312 workType "article" @default.