Voltage%20Transfer%20Characteristic - PowerPoint PPT Presentation

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Voltage%20Transfer%20Characteristic

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Title: Slide 1 Author: ENCS Last modified by: ENCS Created Date: 9/13/2006 12:16:05 AM Document presentation format: On-screen Show Company: CONCORDIA UNIVERSITY – PowerPoint PPT presentation

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Title: Voltage%20Transfer%20Characteristic


1
Voltage Transfer Characteristic
2
The simulated Inverter
3
Inverter layout
TPLH TPHL Tr Tf NML NMH Average power Area (um2)
103.4ps 80.63ps 166.3ps 96.6ps 0.82v 1.76v 1.14e-06w 47.732.4


4
Inverter Characterization
TPLH TPHL Tr Tf NML NMH Average power Area (um2)
103.4ps 80.63ps 166.3ps 96.6ps 0.82v 1.76v 1.14e-06w 47.732.4
.

5
VTC of Seven Inverters, WP WN to WP 7 WN.
6
The threshold voltage for each of the seven
inverters ideal threshold voltage Vth VDD/2
1.65 V
7
Determination of the optimum VTC
WP/WN Ratio Inverter's Vth Percentage Error
1 1.22 26
2 1.34 19
3 1.43 13
4 1.5 9
5 1.55 6
6 1.6 3
7 1.64 1
8
Optimum VTC Wp7WnVdd/2 VTC with Vth, VIL,
and VIH for Inverter for (WP/WN) 7
9
Inverters Transient response
Input Waveform
Output Response
10
Laying out an inverter
The pMOS
The nMOS
The Inverter
11
Inverter Characterization
Static Vth 1.64 V
Static VIL 1.4 V
Static VIH 1.91 V
Static NMH VOH - VIH 1.39 V
Static NML VIL - VOL 1.4 V
Transient TPHL 0.09 ns
Transient TPLH 0.1 NS
Transient TP (TPHLTPLH)/2 0.095 ns
Transient Tfall 0.1 ns
Transient Trise 0.2 ns
Power Pavg 21.85 pw
12
Noise Margins
13
Design Parameter-?r
14
Parasitic Capacitances in an inverter
15
Step Input Response
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