lecture 19: introduction to mixersbwrcs.eecs.berkeley.edu/.../lectures/lect19_2up.pdf · ee142...
TRANSCRIPT
EE142 Lecture19
1
Amin Arbabian
Jan M. Rabaey
Lecture 19:
Introduction to Mixers
EE142 – Fall 2010
Nov. 2nd, 2010
University of California, Berkeley
2 EE142-Fall 2010
Cascode LNA
EE142 Lecture19
2
3 EE142-Fall 2010
Noise from Cascode Device
4 EE142-Fall 2010
Cascode Noise
EE142 Lecture19
3
5 EE142-Fall 2010
Differential LNA Design
6
APPENDIX 1
CORRELATED NOISE
ANALYSIS
EE142 Lecture19
4
7 EE142-Fall 2010
Correlated Noise Sources (Equiv. Noise Gen.)
8 EE142-Fall 2010
Noise Figure of Two-Port
EE142 Lecture19
5
9 EE142-Fall 2010
Optimum Source Impedance
10 EE142-Fall 2010
Minimum Noise Figure
EE142 Lecture19
6
11
INTRODUCTION TO MIXERS
12 EE142-Fall 2010
Introduction to Mixers
EE142 Lecture19
7
13 EE142-Fall 2010
Mixer Operation
14 EE142-Fall 2010
Ideal Mixing
EE142 Lecture19
8
15 EE142-Fall 2010
Ideal Mixing (2)
16 EE142-Fall 2010
Mixer + Filter
EE142 Lecture19
9
17 EE142-Fall 2010
Example
18 EE142-Fall 2010
Receiver Application
EE142 Lecture19
10
19 EE142-Fall 2010
Image Rejection
20 EE142-Fall 2010
Image Reject Filter
EE142 Lecture19
11
21 EE142-Fall 2010
RF Filtering
22 EE142-Fall 2010
Direct Conversion Receiver
EE142 Lecture19
12
23 EE142-Fall 2010
Direct Conversion (Zero-IF)
24 EE142-Fall 2010
Example
EE142 Lecture19
13
25 EE142-Fall 2010
LO Phase in Direct Conversion
26 EE142-Fall 2010
IQ Mixer
EE142 Lecture19
14
27 EE142-Fall 2010
Modulation in Amplitude
28 EE142-Fall 2010
I-Q Plane
EE142 Lecture19
15
29 EE142-Fall 2010
General Modulator
30 EE142-Fall 2010
Digital Modulation (BPSK, QPSK)
For instance, if we transmit 𝐼 𝑡 = ±1 this represents one
bit transmission per cycle. But since the I and Q are
orthogonal signals, we can improve the efficiency of
transmission by also transmitting symbols on the Q axis.
EE142 Lecture19
16
31 EE142-Fall 2010
Increasing Bits per Cycle
32 EE142-Fall 2010
Hartley Mixer
EE142 Lecture19
17
33 EE142-Fall 2010
Delay Operation
34 EE142-Fall 2010
Multiplying by a Complex Signal
EE142 Lecture19
18
35 EE142-Fall 2010
Multiplying by a Real Signal
36 EE142-Fall 2010
Image Problem (Different View)
EE142 Lecture19
19
37 EE142-Fall 2010
Sine / Cosine Mixing
38 EE142-Fall 2010
Image Rejection
EE142 Lecture19
20
39 EE142-Fall 2010
+/- 45 Degree Circuits
40 EE142-Fall 2010
Other Issues