1 / 17

ELECTRONICS CIRCUITS II

ELECTRONICS CIRCUITS II. BY- PANKAJ JAIN ARON COLLEGE GUNA. RC COUPLED AMPLIFIER. RC COUPLED AMPLIFIER. RC coupled amplifier is a common emitter transistor amplifier configuration. RC coupled amplifier can be designed by using potential divider biasing circuit.

holt
Download Presentation

ELECTRONICS CIRCUITS II

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ELECTRONICS CIRCUITS II BY- PANKAJ JAIN ARON COLLEGE GUNA

  2. RC COUPLED AMPLIFIER

  3. RC COUPLED AMPLIFIER • RC coupled amplifier is a common emitter transistor amplifier configuration. • RC coupled amplifier can be designed by using potential divider biasing circuit. • RC coupled amplifier can be used as voltage amplifier. • The o/p of RC coupled amplifier is simply taken from collector. • The coupling used is RC coupling.

  4. RC COUPLED AMPLIFIER (Cntd..) • RC coupled amplifier is a medium frequency amplifier. • R1,R2 combination provides the base current. • RE is used for bias stabilization. • CE is used to by pass the ac components developed across RE. • RC is the collector resistor and it act as a load.

  5. RC COUPLED AMPLIFIER(Cntd..) VCC • Circuit Diagram RC O/P R1 CC CC I/P CE R2 RE

  6. RC COUPLED AMPLIFIER(Cntd..) • The voltage gain of RC coupled amplifier is grater than unity. • The Q point of the transistor must fix in the centre of the active region/Load line. • For that ,fix VCEQ=50% VCC and • IERE= 10% VCC ICRC= 40% VCC

  7. RC COUPLED AMPLIFIER(Cntd..) • LOAD LINE VCC/(RC+RE) Q POINT ICQ VCEQ VCC

  8. RC COUPLED AMPLIFIER(Cntd..) • h parameter equivalentcircuit • To draw the h parameter equivalent circuit, • Draw the AC behavior of the circuit • AC behavior of a circuit • Open circuit all capacitors. • Short circuit all DC power supply.

  9. RC COUPLED AMPLIFIER(Cntd..) VCC I/P O/P

  10. RC COUPLED AMPLIFIER(Cntd..) • AC behavior of a circuit R1 R2 RC

  11. RC COUPLED AMPLIFIER(Cntd..) • h parameter equivalentcircuit hie hfeib + 1/hoe R1 hrevce RC R2 -

  12. RC COUPLED AMPLIFIER(Cntd..) Simplified h parameter equivalentcircuit R1,R2>>hie so R1//R2//hie=hie hre Vce is a very small voltage , so it is neglected. 1/hoe//RC=RC Now ckt becomes

  13. RC COUPLED AMPLIFIER(Cntd..) Simplified h parameter equivalentcircuit hie hfeib I/P RC

  14. RC COUPLED AMPLIFIER(Cntd..) Frequency Response Gain BW f1 f1 Frequency

  15. RC COUPLED AMPLIFIER(Cntd..) • If we express gain in db, frequency response will be Max Gain in db 3db Gain BW f1 Frequency f1

  16. RC COUPLED AMPLIFIER(Cntd..) Design Assume VCC,IC,β O/P Loop equation VCC=ICRC +VCE+IERE VCE=50% VCC, ICRC=40% VCC Assume that Ic=IE IERE=10% VCC I/P Loop equation IC= β IB VCC=10 IB R1+VBE+IERE ; 9IB R2=VBE+IERE R1=VCC –VBE - IERE/ 10 IB ;R2=VBE+IERE/ 9IB

  17. THANK YOU

More Related