Ocean Currents. Two Types of Currents 1.Surface Currents 2.Deep water currents- very slow.
1 Switched Currents
of 45
-
Upload
melody-shields -
Category
Documents
-
view
221 -
download
0
Transcript of 1 Switched Currents
-
7/30/2019 1 Switched Currents
1/45
Page 1 of 45
Prof. Chris Toumazou
-
7/30/2019 1 Switched Currents
2/45
Page 2 of 45
-
7/30/2019 1 Switched Currents
3/45
Page 3 of 45
-
7/30/2019 1 Switched Currents
4/45
Page 4 of 45
-
7/30/2019 1 Switched Currents
5/45
Page 5 of 45
-
7/30/2019 1 Switched Currents
6/45
Page 6 of 45
-
7/30/2019 1 Switched Currents
7/45
Page 7 of 45
-
7/30/2019 1 Switched Currents
8/45
Page 8 of 45
Second generation SI cell
-
7/30/2019 1 Switched Currents
9/45
Page 9 of 45
-
7/30/2019 1 Switched Currents
10/45
Page 10 of 45
-
7/30/2019 1 Switched Currents
11/45
Page 11 of 45
-
7/30/2019 1 Switched Currents
12/45
Page 12 of 45
-
7/30/2019 1 Switched Currents
13/45
Page 13 of 45
-
7/30/2019 1 Switched Currents
14/45
Page 14 of 45
-
7/30/2019 1 Switched Currents
15/45
Page 15 of 45
-
7/30/2019 1 Switched Currents
16/45
Page 16 of 45
-
7/30/2019 1 Switched Currents
17/45
Page 17 of 45
-
7/30/2019 1 Switched Currents
18/45
Page 18 of 45
-
7/30/2019 1 Switched Currents
19/45
Page 19 of 45
-
7/30/2019 1 Switched Currents
20/45
Page 20 of 45
-
7/30/2019 1 Switched Currents
21/45
Page 21 of 45
-
7/30/2019 1 Switched Currents
22/45
Page 22 of 45
-
7/30/2019 1 Switched Currents
23/45
Page 23 of 45
-
7/30/2019 1 Switched Currents
24/45
Page 24 of 45
-
7/30/2019 1 Switched Currents
25/45
Page 25 of 45
-
7/30/2019 1 Switched Currents
26/45
Page 26 of 45
-
7/30/2019 1 Switched Currents
27/45
Page 27 of 45
-
7/30/2019 1 Switched Currents
28/45
Page 28 of 45
-
7/30/2019 1 Switched Currents
29/45
Page 29 of 45
-
7/30/2019 1 Switched Currents
30/45
Page 30 of 45
-
7/30/2019 1 Switched Currents
31/45
Page 31 of 45
-
7/30/2019 1 Switched Currents
32/45
-
7/30/2019 1 Switched Currents
33/45
Page 33 of 45
-
7/30/2019 1 Switched Currents
34/45
Page 34 of 45
-
7/30/2019 1 Switched Currents
35/45
Page 35 of 45
-
7/30/2019 1 Switched Currents
36/45
Page 36 of 45
-
7/30/2019 1 Switched Currents
37/45
Page 37 of 45
-
7/30/2019 1 Switched Currents
38/45
-
7/30/2019 1 Switched Currents
39/45
Page 39 of 45
-
7/30/2019 1 Switched Currents
40/45
Page 40 of 45
-
7/30/2019 1 Switched Currents
41/45
Page 41 of 45
-
7/30/2019 1 Switched Currents
42/45
Page 42 of 45
-
7/30/2019 1 Switched Currents
43/45
Page 43 of 45
-
7/30/2019 1 Switched Currents
44/45
Page 44 of 45
-
7/30/2019 1 Switched Currents
45/45
E416 Spring 2007-set 1
Suggested problems Current mirrors and switched currents
1. Calculate the frequency dependence of the input impedance of a sourcedegenerated common source amplifier. Use this result to calculate the frequency
dependence of the small signal input impedance of the Wilson current mirror. It
may help to do the analysis as feedback problem rather than a circuit problem.Please remember the current input is meant to be driven by a vanishing
admittance current source!
2. Calculate the DC current gain error for matched BJT transistors for the simplecurrent mirror. Include the Early Effect. Use this result to infer the small signal
current gain error of the MOS simple current at a finite frequency, if you know
theT
f of the process. Remember the finite frequency current gain of a MOS
transistor is imaginary, i.e. incurs a 90 degree phase lag.
3. Calculate symbolically the small signal power gain of a simple BJT mirror at afinite frequency.
4. Calculate the harmonic distortion of a class A FET simple current mirror if theAC signal amplitude is equal to the bias, and if the AC signal amplitude is half the
bias, both at a finite frequency. Note that in strong inversion the gate-source
capacitance is essentially constant, so that the circuit IS NOT linear-time
invariant!
5. Calculate symbolically and plot the I-V characteristic of a diode connected (gate-drain connected together) FET, for:
a. A long gate FET: ( ) ( )2 12
DS L GS T DS
WI K V V V
L=
b. A short gate FET: ( )1.501.5
DS S GS T DS
WI K V V V
L=
c. In weak inversion: ( ) ( )/ /1GS T DSq V V nkT qV kT DS WI M e eL
=
For the purposes of this exercise you may assume 210 /LK A V= ,
1.510 /S
K A V= , 100M nA= , 0.3TV V= , .01= and .05 = . What is the gm
of each case? What are the typical impedance levels encountered?
6. Observe that a second generation switched current memory cell is equivalent to asimple current mirror driven by the signal masked by the switching waveform.
Use the results form Q3 above, the Convolution theorem and Power conservation
to estimate the gain error as a function of switching and signal frequency,provided the signal frequency satisfies the Nyquist criterion.
