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Measurement & Instrumentation

by: Jairo Dooley

Measurement & Instrumentation PHY 6753

Marketplace > University of South Florida > Physics 2 > PHY 6753 > Measurement Instrumentation
Jairo Dooley
GPA 3.9

Myung Kim

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Myung Kim
Class Notes
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This 6 page Class Notes was uploaded by Jairo Dooley on Wednesday September 23, 2015. The Class Notes belongs to PHY 6753 at University of South Florida taught by Myung Kim in Fall. Since its upload, it has received 38 views. For similar materials see /class/212682/phy-6753-university-of-south-florida in Physics 2 at University of South Florida.


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Date Created: 09/23/15
REVIEW OF BASIC ELECTRONICS 0 Ohms law 0 FET analog switch 0 voltage amp current sources 0 CMOS logic switches o Thevenin s amp Norton s theorems o representations 0 impedance 0 tristate bus driver 0 RC circuit 0 clocked RS flipflop o transistor models 0 JK masterslave ip op o emitter follower o operational amplifier 0 transistor current source 0 basic opamp circuits 0 field effect transistors OHM S LAW VOLTAGE amp CURRENT SOURCES Internal Resistance amp Loading vvvv Snuxce Load Rm T lt Rn gt ltgt Va 0 Almost always it is desirable to have low output impedance of source and high input impedance of load Electronics Review THEVENIN S amp NORTON S THEOREMS Thevenin s Theorem Any network of linear circuit elements sources resistors impedance having rminals can be replaced by a single equivalent voltage source VTh connected in series with a single resistor impedance th VTh is equal to the voltage across the two terminals when they are open V Rm is equal to VTh divided by the current that would flow if output terminals are shorted Rm pg Rm is also equal to the resistance between the two terminals when any voltage sources are shorted and any current sources are open The Thevenin equivalent circuit is equivalent in the sense that whatever load ie resistance 0 r impedance is attached to the output terminals the voltage across and the current owing through the load will be the same AAAA vvvv JVN R1 R v Rth 1 Igt T w AAAA VVVV RR VmV 2 gt Rm 1 2 R1R2 R1R2 AAAA AAAA VVVV VRVVV R1 th J gt quot v 4 Rzii RL E RL T ltgt ltgt 1 ltgt VR R V 39 I VRZ L 7 L 7 RlRZ RlRL RZRL RlRZ R1RL RZRL Electronics Review IMPEDANCE Z R R resistance XCXL reactance X XC capacitive reactance X L wL inductive reactance Xc 1uC Ohm s law generalized vt itZ Z RJX ZeW itIUe vt itZ IUeJmJUZIeN In Zeilml lvltll Z 39 39 it At dc a capacitor looks like an open circuit and and an inductor a short circuit a gt 0 Va ID At high frequency a capacitor looks like a short and an inductor an open circuit a gt oo XC 39 Power Dissipated in an AC Circuit P Reit Re 0 2 Re may IUVU cost1 resistive load 11 0 gt P JIUVU Also note that P i In X V I me reactive load 11 7r 2 gt Electronics Review RC CIRCUIT Charging and Dicharging of Capacitor u o Vlt time constant 4 RC general solution for v switching from VD to V1 v60 K e V3117 e Vi vct W K 7 V3 VRt kkt t l VVV rltlt1f Vclt Vth t rgtgt1f vct vRt t ii ii t Electronics Review LowPass Filter vt VneJquot output across capacitor vc t A VD e gcvt c J Vc jwc J Vc g v RijwC Igcle amplitude gain I I 1 1 RC g 11 tan 7a C quot1wRCZ C 1 powergain GCgC W Gain and Decibels Amplitude gain gVJ L or V l m G IgiZ for P M2 or I112 Power gain Decibel Gin dB lologmG 2010gmlgi dB G 0 1 1 1 13 11 3 2 14 6 4 2 10 10 32 20 100 10 30 1000 32 40 10000 100 3 05 071 10 0 032 20 001 0 If there are a number of ampli cation stages then the total gain is the product of gains If the gain is expressed in dB then G


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