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Electronics Reference

Power Amplifiers

Power Amplifiers

Operating CyclePower Efficiency
Class Alatex!encoded:base64,MzYwXntcY2lyY30=latex!encoded:base64,MjVcJVw7XHRleHRybXt0b31cOzUwXCU=
Class Blatex!encoded:base64,MTgwXntcY2lyY30=latex!encoded:base64,NzguNVwl
Class AB
latex!encoded:base64,MTgwXntcY2lyY31cO1x0ZXh0cm17dG99XDszNjBee1xjaXJjfQ==latex!encoded:base64,MjVcJVw7XHRleHRybXt0b31cOzUwXCVcO1x0ZXh0cm17YW5kfVw7NzguNVwl
Class Clatex!encoded:base64,XHRleHRybXtMZXNzfVw7XHRleHRybXt0aGFufVw7MTgwXntcY2lyY30=latex!encoded:base64,XHRleHRybXs5MFwlIG1heCAodGhlb3JldGljYWwpfQ==
Class Dlatex!encoded:base64,XHRleHRybXtQdWxzZVw7T3BlcmF0aW9ufQ==latex!encoded:base64,XHRleHRybXtUeXBpY2FsbHlcO292ZXJcO305MFwl
 > Power Amplifiers

Class A Series-Fed Amplifier

Power drawn from the power supplylatex!encoded:base64,XHRleHRybXtQfV97aV97KFx0ZXh0cm17REN9KX19PVx0ZXh0cm17Vn1fe1x0ZXh0cm17Q0N9fVx0ZXh0cm17SX1fe1x0ZXh0cm17Q31fe1x0ZXh0cm17UX19fQ==
Power delivered to the loadlatex!encoded:base64,XHRleHRybXtQfV97b197XHRleHRybXsoQUMpfX19PVx0ZXh0cm17Vn1fe1x0ZXh0cm17Q0V9X3tcdGV4dHJteyhSTVMpfX19XHRleHRybXtJfV97XHRleHRybXtDfV97XHRleHRybXsoUk1TKX19fT1cZnJhY3tcdGV4dHJte1Z9X3tcdGV4dHJte0N9X3tcdGV4dHJteyhSTVMpfX19XnsyfX17XHRleHRybXtSfV97XHRleHRybXtDfX19PVx0ZXh0cm17SX1fe1x0ZXh0cm17Q31fe1x0ZXh0cm17KFJNUyl9fX1eezJ9XHRleHRybXtSfV97XHRleHRybXtDfX0=
Amplifier efficiencylatex!encoded:base64,XCVcO1xldGEgPSBcZnJhY3tcdGV4dHJte1B9X3tvX3tcdGV4dHJteyhBQyl9fX19e1x0ZXh0cm17UH1fe2lfeyhcdGV4dHJte0RDfSl9fX0gXHRpbWVzIDEwMFwl
 > Class A Series-Fed Amplifier

Class A Transformer-Coupled Amplifier

Power drawn from the power supplylatex!encoded:base64,XHRleHRybXtQfV97aV97KFx0ZXh0cm17REN9KX19PVx0ZXh0cm17Vn1fe1x0ZXh0cm17Q0N9fVx0ZXh0cm17SX1fe1x0ZXh0cm17Q31fe1x0ZXh0cm17UX19fQ==
Power delivered to the loadlatex!encoded:base64,XHRleHRybXtQfV97b197XHRleHRybXsoQUMpfX19PVxmcmFjezF9ezh9IFxsZWZ0IFsgXGxlZnQgKCBcdGV4dHJte1Z9X3tcdGV4dHJte0NFfV97XHRleHRybXsoTUFYKX19fSAtIFx0ZXh0cm17Vn1fe1x0ZXh0cm17Q0V9X3tcdGV4dHJteyhNSU4pfX19IFxyaWdodCApIFxsZWZ0ICggXHRleHRybXtJfV97XHRleHRybXtDfV97XHRleHRybXsoTUFYKX19fSAtIFx0ZXh0cm17SX1fe1x0ZXh0cm17Q31fe1x0ZXh0cm17KE1JTil9fX0gXHJpZ2h0ICkgXHJpZ2h0IF0=
Power dissipated by the transistorlatex!encoded:base64,XHRleHRybXtQfV97XHRleHRybXtRfX0gPSBcdGV4dHJte1B9X3tpX3soXHRleHRybXtEQ30pfX0gLSBcdGV4dHJte1B9X3tvX3tcdGV4dHJteyhBQyl9fX0=
Amplifier efficiencylatex!encoded:base64,XCVcO1xldGEgPSBcbGVmdCAoIFxmcmFje1x0ZXh0cm17Vn1fe1x0ZXh0cm17Q0V9X3tcdGV4dHJteyhNQVgpfX19IC0gXHRleHRybXtWfV97XHRleHRybXtDRX1fe1x0ZXh0cm17KE1JTil9fX19e1x0ZXh0cm17Vn1fe1x0ZXh0cm17Q0V9X3tcdGV4dHJteyhNQVgpfX19ICsgXHRleHRybXtWfV97XHRleHRybXtDRX1fe1x0ZXh0cm17KE1JTil9fX19IFxyaWdodCApXnsyfSAoNTApXDtcJQ==
 > Class A Transformer-Coupled Amplifier

Class B/AB Amplifier

Power drawn from the power supplylatex!encoded:base64,XHRleHRybXtQfV97aV97KFx0ZXh0cm17REN9KX19PVx0ZXh0cm17Vn1fe1x0ZXh0cm17Q0N9fVxsZWZ0ICggXGZyYWN7Mn17XHBpIH1cdGV4dHJte0l9X3tcdGV4dHJte1B9fSBccmlnaHQgKQ==
Power delivered to the loadlatex!encoded:base64,XHRleHRybXtQfV97b197XHRleHRybXsoQUMpfX19PVxmcmFje1x0ZXh0cm17Vn1fe1x0ZXh0cm17TH1fe1x0ZXh0cm17KFJNUyl9fX1eezJ9fXtcdGV4dHJte1J9X3tcdGV4dHJte0x9fX09XGZyYWN7XHRleHRybXtWfV97XHRleHRybXtMfV97XHRleHRybXsoUC1QKX19fV57Mn19ezhcdGV4dHJte1J9X3tcdGV4dHJte0x9fX09XGZyYWN7XHRleHRybXtWfV97XHRleHRybXtMfV97XHRleHRybXsoUCl9fX1eezJ9fXsyXHRleHRybXtSfV97XHRleHRybXtMfX19
Power dissipated by each transistorlatex!encoded:base64,XHRleHRybXtQfV97XHRleHRybXtRfX0gPSBcZnJhY3sxfXsyfSBcdGV4dHJte1B9X3syXHRleHRybXtRfX09IFxmcmFjezF9ezJ9XGxlZnQgKCBcdGV4dHJte1B9X3tpX3soXHRleHRybXtEQ30pfX0gLSBcdGV4dHJte1B9X3tvX3tcdGV4dHJteyhBQyl9fX0gXHJpZ2h0ICk=
Amplifier efficiencylatex!encoded:base64,XCVcO1xldGEgPSBcZnJhY3tcdGV4dHJte1B9X3tvX3tcdGV4dHJteyhBQyl9fX19e1x0ZXh0cm17UH1fe2lfeyhcdGV4dHJte0RDfSl9fX0gXHRpbWVzIDEwMFwlPVxmcmFje1xmcmFje1x0ZXh0cm17Vn1fe1x0ZXh0cm17TH1fe1x0ZXh0cm17KFApfX19XnsyfX17Mlx0ZXh0cm17Un1fe1x0ZXh0cm17TH19fX17XHRleHRybXtWfV97XHRleHRybXtDQ319XGxlZnQgKCBcZnJhY3syfXtccGkgfVx0ZXh0cm17SX1fe1x0ZXh0cm17UH19IFxyaWdodCApfSBcdGltZXMgMTAwXCU9XGZyYWN7XHBpIH17NH1cZnJhY3tcdGV4dHJte1Z9X3tcdGV4dHJte0x9fV97XHRleHRybXsoUCl9fX17XHRleHRybXtWfV97XHRleHRybXtDQ319fSBcdGltZXMgMTAwXCU=
 > Class B/AB Amplifier

Class C Amplifier

Inductive Reactancelatex!encoded:base64,XHRleHRybXtYfV97XHRleHRybXtMfX09MlxwaSBcdGV4dHJte2Z9X3tcdGV4dHJte3J9fVx0ZXh0cm17TH0=
Inductor Quality Factor
latex!encoded:base64,XHRleHRybXtRfV97XHRleHRybXtMfX09XGZyYWN7XHRleHRybXtYfV97XHRleHRybXtMfX19e1x0ZXh0cm17Un1fe1x0ZXh0cm17U319fQ==

XL - Inductive Reactance
RS - Inductor Series Resistance
Inductor Equivalent Parallel Resistancelatex!encoded:base64,XHRleHRybXtSfV97XHRleHRybXtQfX09XHRleHRybXtRfV97XHRleHRybXtMfX1cdGV4dHJte1h9X3tcdGV4dHJte0x9fVw7XDtcO1xsZWZ0ICggXHRleHRybXtRfV97XHRleHRybXtMfX0+IDEwIFxyaWdodCAp
AC Resistance at Collector Terminallatex!encoded:base64,XHRleHRybXtyfV97Y309XHRleHRybXtSfV97XHRleHRybXtQfX0gXHBhcmFsbGVsIFx0ZXh0cm17Un1fe1x0ZXh0cm17TH19
Overall Quality Factorlatex!encoded:base64,XHRleHRybXtRfT1cZnJhY3tcdGV4dHJte3J9X3tjfX17XHRleHRybXtYfV97XHRleHRybXtMfX19
Bandwidthlatex!encoded:base64,XHRleHRybXtCV309XGZyYWN7XHRleHRybXtmfV97XHRleHRybXtyfX19e1x0ZXh0cm17UX19
Maximum Output Voltagelatex!encoded:base64,XHRleHRybXtWfV97XHRleHRybXtPVVR9X3tcdGV4dHJteyhNQVgpfX19PTJcdGV4dHJte1Z9X3tcdGV4dHJte0NDfX0=
Maximum Power Dissipationlatex!encoded:base64,XHRleHRybXtQfV97XHRleHRybXtEfX09XGZyYWN7KFx0ZXh0cm17Vn1fe1x0ZXh0cm17T1VUfV97XHRleHRybXsoTUFYKX19fSleezJ9fXs0MFx0ZXh0cm17cn1fe2N9fQ==
 > Class C Amplifier

Amplifier Distortion

latex!encoded:base64,XCVcO25cdGV4dHJte3RoXDtIYXJtb25pY1w7RGlzdG9ydGlvbn0gPSBcJVw7XHRleHRybXtEfV97bn0gPSBcZnJhY3tcbGVmdCB8IFx0ZXh0cm17QX1fe259IFxyaWdodCB8fXtcbGVmdCB8IFx0ZXh0cm17QX1fezF9IFxyaWdodCB8fSBcdGltZXMgMTAwXCU=

A1 - Fundamental frequency amplitude
Annth frequency component amplitude

latex!encoded:base64,XCVcO1x0ZXh0cm17VG90YWxcO0hhcm1vbmljXDtEaXN0b3J0aW9uXDsoVEhEKX09XHNxcnR7KFx0ZXh0cm17RH1fezJ9KV57Mn0rKFx0ZXh0cm17RH1fezN9KV57Mn0rKFx0ZXh0cm17RH1fezR9KV57Mn0rXGNkb3RzICsoXHRleHRybXtEfV97bn0pXnsyfX1cO1x0aW1lcyBcOzEwMFwl
 > Amplifier Distortion
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