clock generation

3
Clock Generation Ph 2 Ph 1 Ph 1e 2500ps 250ps 250ps 100ps Ph 2e 100ps T rising = 50 ps T falling = 50 ps

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Clock Generation. T rising = 50 ps. T falling = 50 ps. Switch-capacitor CMFB. [1] Gray’s book: Chapter 12, 12.5.4 Switched-Capacitor CMFB [2] “Analysis of Switched-Capacitor Common-Mode Feedback Circuit” by Ojas Choksi. - PowerPoint PPT Presentation

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Page 1: Clock Generation

Clock Generation

Ph2

Ph1

Ph1e

2500ps

250ps 250ps

100ps

Ph2e

100ps

Trising = 50 ps

Tfalling = 50 ps

Page 2: Clock Generation

Switch-capacitor CMFB

[1] Gray’s book: Chapter 12, 12.5.4 Switched-Capacitor CMFB[2] “Analysis of Switched-Capacitor Common-Mode Feedback Circuit” by Ojas Choksi

Cb

Cb Ca

Ca

Ph1 Ph2Vop

Von

VCMFB VB4

0.5VDD

0.5VDD

=

Ph1

Ph2

Ph2

Ph1

Page 3: Clock Generation

Ph2C1

C2

Ph1e

Ph1e

Vcmo

Vcmi

Ph2

Ph1

Ph1

C3Ph1

C4Ph1

Ph2

C1

C2

Vcmo Ph2

Ph1

Ph1

C3Ph1

C4Ph1

Ph1

Vin+

Vin-

Vout+

Vout-