# ความรู้พื้นฐานทางวิศวกรรมไฟฟ้า(252282) ความรู้พื้นฐานเบื้องต้น

(252282) Op-Amp (Operational Amplifiers) (CANDLE) (Op-Amp,

Operational Amplifier) 3 (Voltage-Controlled Voltage Source, VCVS) (Op-Amp, Operational Amplifier) (Op-Amp, Operational Amplifier) (Non-inverting

Terminal) N o n i n v e r ti n g i n p u t (Inverting O u tp u t Terminal) I n v e r ti n g i n p u t (Output Terminal) (Op-Amp, Operational Amplifier) v2

Ri R o : Ri vd A vd : R o vd v1 : vd v2 v1 vo (Op-Amp, Operational Amplifier) vvo Av AAvv2 vv1 d Av o d 2 1

A Param Typical Ideal v2 vd v1 Ri Ro A vd vo eter A Ri range 105 to 108 values 105 to 1013 (Op-Amp,

Operational Amplifier) v o 3 - V C C P o s i ti v e S a tu r a ti o n v d (Positive N e g a ti v e S a tu r a ti o n -V C C saturation) - i1= 0 vd A

i = 0 2 R i Ro 0 0Hz Hz io i1= 0 vd i 0 , i 0 1

2 i2= 0 io inverting (Stability) : (Positive /Negative Saturation)

R2 R1 vS v1 vo v1 vS 0 R2 R1 v1 vd v2 (2) (1) vo R1 R2 R1____ (1) vS v1 vo R2 R2 (2) vo Avd A v2 - v1____

R1 R2 R1 vS v1 A v2 v1 R2 R2 R1 R2 R1 R1 vs Av2 A v1 R2 R2 R2 R1 1 A R1 vs Av2 1 v1 ____ (3) R2 R2 3

1 R1 1 A vS R1 v2 v1 A R2 AR2 A 0 1 0 R1 vS R1 v2 v1 A R2 A R2 v2 v1 i1= 0 v1 io 0 v 0 vd v2 v1 0 v2 i2= 0

d (Cascade) Cascade (Cascade) v1 S ta g e 1 S ta g e 2 S ta g e 3 v2= A 1v1 v3= A 2v2 vo= A 3v3 A1 A2 A3

v1 A vo (Cascade) A A1 A2 A3 vo A1 A2 A3 v1 Av1 S ta g e 1 R2 S ta g e 2 R1 vi gain R4 R3 R2 R1

R2 vi R1 gain R4 R3 vo R4 R2 vi R3 R1 (Inverting Amplifier) KCL i2 v1 : vi i1 i2 0 v1 vi v1 vo 0 R1 Rf vi

R1 i1 v 1 v2 Rf 0A 0V 0A v1 v2 v2 0 vo vo (Inverting Amplifier) vi vo 0 R1 R f vo Rf

R1 vi R1 vi Rf vo vi R1 vi i2 i1 v 1 v2 Rf 0A 0V 0A vo vo

(Non-Inverting Amplifier) KCL i2 Rf v1 : R1 i1 i2 0 i1 v 1 v2 vi v1 0 v1 vo 0 R1 Rf 0A 0V 0A v1 v2

v2 vi vo vo (Non-Inverting Amplifier) vi vi vo 0 R1 Rf Rf vo 1 R1 vi R1 Rf vo 1 vi R1 i2

i1 v 1 v2 vi Rf 0A 0V 0A vo vo (Summing Amplifier) KCL R v 1 i1 i2 i3 i v1 va i1 R1 v3 va i3 R3 v2 va

i2 R2 v v i a o Rf v 2 v 3 1 R i 1 2 R i 2 va :i v a R

f 0A 0V 3 i 3 0A v o v Rf Rf Rf vo v1 v2 v3 R1 R2 R3 a v 0

o (Summing Amplifier) v 1 v 2 v 3 R i 1 R i 1 2 R i 2

v a R f 0A 0V v o 3 i 3 R1 R2 R3 R v 0A o vo Rf R

v v v 1 2 3 (Difference Amplifier) KCL va v1 va vo 0 R1 R2 va : R1 v1 R2 R vo 1 va 2 v____ (1) 1 R1

R1 KCL vb v2 vb 0 0 R3 R4 v2 R3 R2 va vb 0A R4 v b :R 0A vo vo vb

v____ 2 (2) R R 4 3 4 (Difference Amplifier) va vb vb (2) va (1) R2 R4 R2 vo 1 v1 v2 R1 R1 R3 R4 R2 1 R1 R2 R2 vo v2 v1 R1 1 R3 R4 R1

(Difference Amplifier) R3 R1 R2 R4 R2 vo v2 v1 R1 R1 R2 R3 R4 vo v2 v1 Schwarz and Oldham, Electrical

Engineering, 2nd, Saunders College Publishing, 1993 Giorgio Rizzoni, Principles and Applications of Electrical Engineering, 4th, McGRAW-Hill Companies, 2003

## Recently Viewed Presentations

• NATS 101 Section 13: Lecture 22 Fronts
• Climate, Vegetation and Ecosystems. Physical Geography: Climate and Vegetation. Climate is created by the sun's solar energy interacting with the earth's land, water, and air. In turn, climate and soil shape the earth's vegetation.
• Use this workbook with the "Biology Cycles of Life" text book and using online science resources. The page numbers correlate with the textbook and help define vocabulary words and answer some questions.
• Stimulus VISUAL AUDITORY KINAESTHETIC IDEATIONAL TACTILE what we see what we hear movement what we touch ideas Visual Visual what we see films The following images, descriptions of dreams and short film excerpts could be used to stimulate ideas for...
• Week 11-B Feminine Subjectivity Central Question: Should feminist politics do without a "subject" in the category of women? (367) Foundationalist view An identity must first be in place in order for political interests to be elaborated and, subsequently, political action...
• Similarly, a 1 x 2n demultiplexor: It takes 1 input and transmits that input on exactly one of its outputs, determined by the pattern of its n selector bits. 1 x 8 demux 4 x 2 encoder 4 3 *©2006-09...
• Defining, Measuring & Weighing "Values" as they apply to new oncology treatments and drugs in general is a challenge faced by many stakeholders with different interests. Patients: Have the most vested interest. Advocacy groups: Equal and timely access to effective...
• Switching Fields. Changing jobs is not unusual in 2018. The U.S. Bureau of Labor Statistics found the median number of years most employees stay with the same employer is 4.2 years.