ECE137A Problem set #2 Problem 1. Simple common-emitter amplifier +Vcc a) The transistor has beta=200. Vcc is +10 Volts. RL=1000 Ohm. Rgen=1 kOhm. Rc Rb1 The transistor has Va=100 V and Vcesat=0.5 volts
Vout Rgen Vin Rb2 Vgen Ree
RL
We want the emi
ECE137A Problem set #5 Problem 1
The transistors Q1 and Q2 have beta=50 and Va=50 V, Vcc= +5 Volts, Rgen=1 kOhm, RL=1 kOhm. Bias Q1 at 1 mA collector current, Q2 at 5 mA collector current, bias the emitter of Q2 at 4V, the Q2 collector at 1 V, and t
ECE137a Lab project 3 You will first be designing and building an op-amp. The op-amp will then be configured as a narrow-band amplifier for amplification of voice signals in a public address system . Part 1 You must first design and construct an op-a
ECE137B: High-Frequency Amplifier Crib Sheet, Page 1
Basics: Transistor small-signal high-frequency models Hybrid-pi model: Cm = Cbc Cp = Cbe = Cp ,depl + Cp ,diff Cp ,diff = gm t f ft = gm 2 p Cp + Cm gm = a re = Ic VT Rp = (b + 1)re Ro = VA IC
B
CD4007C Dual Complementary Pair Plus Inverter
October 1987 Revised January 1999
CD4007C Dual Complementary Pair Plus Inverter
General Description
The CD4007C consists of three complementary pairs of Nand P-channel enhancement mode MOS transistors s
Single stage amplifier crib sheet, page 1
Basics: Amplifiers at Low Frequencies
B R or Rbe + Vbe E gm*Vbe C Ro or Rce
G + Vgs S gm*Vgs D Ro or Rds
Left is the equivalent circuit of a bipolar transistor; g m = I E / VT = 1 / re , VT = kT / q , r = r
First test
Vout R1 Vgen C2
First test circuit: Use this circuit not only to test the closed loop frequency response but also when you are checking general DC bias conditions and correct functional circuit operation.
C1 R2
R3
If you ground the inp
ECE137A Problem set #1 Problem 1. bipolar transistor biasing. Assume a Vbe(on) of 0.7 volts. a) Vcc beta=100 Vcc=10 Volts. What base current is required for Ic=1 mA ? Ib Rc If Ic=1 mA, what Rc is required for Vc=5 Volts ?
Vc
(this biasing circuit n
ECE137AB: Writing Preliminary Design reports and Lab Reports
Mark Rodwell, ECE Dept, UCSB January 24, 2003
Background Engineering design is a balance of theory and testing. The IC design flow is as follows. The circuit is first designed on-paper and
ECE137A Problem set 7
Vcc Q6 Q7
Rref
Q4 Q2 Q3 Ree1 Ree2
Problem 1: Is6=2Is7. Is5=Is4/3=Is3/4=Is2=3Is1. Vcc is 10 volts. NPNs have beta=200. PNPs have beta=10. Va= infinity. The MOSFETs have a 0.3 V threshold, v sat coxW g =2 mA/V (use constantQ9
ECE137a Problem set 3
Vcc Rb1 Rc
1. Common-emitter amplifier with emitter degeneration. The bjt has beta=100 and Va=50 V. Vcc is 10 V. RL=1 KOhms and Rgen=1 KOhm. Reac is 50 Ohms
RL
Rgen
Reac Rb2
Redc
Bias: Set the collector voltage at 5 V, the
ECE137A Problem set #6
+Vcc Ree8 Rc1 Rc2 Rc8 Q8 Ree9 Q9 Ree6 Q5 Ree5 Q6
Problem 1: The supplies are +/- 5 V. The transistors all have beta=500 and Va=100 Volts. The Emitter resistors (Re3 and Re4, Ree8, Ree9) all have 200 mV DC voltage drop. Ri=10 k
ECE137A Problem set 8
R Vout
Vin C
R Vin Q1 Q2
Vout
Problem 1: Ignore DC bias analysis. You don't need it. The transistor has transconductance gm. Its output resistance Rds is infinity. (a) Draw a small-signal equivalent circuit of the circuit.
Final Exam, ECE 137A Wednesday March 21, 2001 8-11 AM
Closed Book Exam. Class Crib-Sheet and 2 pages (4 surfaces) of student notes permitted Do not open this exam until instructed to do so. Use any and all reasonable approximations, after stating th
Pdsf 7'11! So/wzau
Final Exam, ECE 137A
Thursday March 18, 2004 8-11 AM
Name: M A
Closed Book Exam: Class Crib-Sheet and 2 pages (4 surfaces) of student notes permitted
Do not open this exam until instructed to do so. Use any and all reasonable
approximat
Problem 1, 100 points
You will be working on the circuit below:
Vout
FlL
M
Q1 and Q2: 8:75, Va=200 Volts.
Rbl: 10 kOhm. Reel: ? Rc2=? Rb kOhm
Rgen=1 kOhm Ree2= ? Reac2=25 Ohm
Vcc: +10 Volts -Vee= 10 Volts
Cout, and Cee are very big.
yaw: gay 7w 3 00/21
ECE 137 A Mid-Term Exam
February 10, 2003
Do not open exam until instructed to.
Closed book: Crib sheet and 1 page personal notes permitted
There are 2 problems on this exam , and your have 50 minutes.
Use any and all reasonable approximations (5% accurac
ECE 137 A Mid-Term Exam
February 15, 2002
Do not open exam until instructed to.
Closed book: Crib sheet and 1 page personal notes permitted
There is one problem on this exam (pans AF) , anc your gave 50 minutes.
Use any and all reasonable approximations (
ECE137A Problem set 7
Vcc
Q6
Problem 1:
Is6=2Is7.
Is5=Is4/3=Is3/4=Is2=3Is1.
Vcc is 10 volts.
NPNs have beta=100. PNPs have beta=20.
Va= infinity. The MOSFETs have a 0.2 V
threshold, v sat coxWg =2 mA/V (use constant-
Q7
Rref
Q4
Q2
Q1
Q5
velocity model), a
ECE137A Problem set #6
+Vcc
Ree8
Rc1
Rc2
Problem 1: The supplies are +/- 5 V. The
transistors all have beta=100 and Va=100
Volts. The Emitter resistors (Re3 and Re4,
Ree8, Ree9) all have 150 mV DC voltage
drop. Ri=10 kOhm. RL=1 kOhm.
Ree5=Ree6=100 Ohm
Ree
ECE 137 A Mid-Term Exam February 9, 2004
Do not open exam until instructed to. Closed book: Crib sheet and 1 page personal notes permitted There are 2 problems on this exam, and your have 50 minutes. Use any and all reasonable approximations (5% acc
ECE 137 A Mid-Term Exam February 7, 2005
Do not open exam until instructed to. Closed book: Crib sheet and 1 page personal notes permitted There are 2 problems on this exam, and your have 50 minutes. Use any and all reasonable approximations (5% acc
ECE 137 A Mid-Term Exam February 15, 2002
Do not open exam until instructed to. Closed book: Crib sheet and 1 page personal notes permitted There is one problem on this exam (parts A-F) , and your have 50 minutes. Use any and all reasonable approxim
ECE 137 A Mid-Term Exam February 13, 2006
Do not open exam until instructed to. Closed book: Crib sheet and 1 page personal notes permitted There are 2 problems on this exam, and your have 50 minutes. Use any and all reasonable approximations (5% ac
ECE 137 A Mid-Term Exam February 15, 2001
Do not open exam until instructed to. Closed book: Crib sheet and 1 page personal notes permitted There is one problem on this exam (parts A-F) , and your have 50 minutes. Use any and all reasonable approxim