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Stavelet Clocks
12

Stavelet Clocks

Jan 16, 2016

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Sonja Sepa

Stavelet Clocks. Stavelet Numerology. The Stavelet. Probe Points. DCLK, BR. BCO after Blocking C (TR). BCO, BL. BCO before Blocking C (TL). H0: BCO after blocking capacitors. H0: BCO before blocking capacitors. H0: DCLK at hybrid termination resistor. - PowerPoint PPT Presentation
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Page 1: Stavelet  Clocks

Stavelet Clocks

Page 2: Stavelet  Clocks

2

The Stavelet

Hybrid 0 1 2 3 4 5 6 7

BCC 62 61 60 59 58 57 56 55

MUX 7 6 5 4 3 2 1 0

DEMUX 14/15 12/13 10/11 8/9 6/7 4/5 2/3 0/1

Coupling DC AC AC DC AC DC AC DC

Module 0 1 2 4

s/n 1 9 3 4

Stavelet Numerology

Page 3: Stavelet  Clocks

3

Probe Points

BCO beforeBlocking C

(TL)

BCO, BL

DCLK, BRBCO afterBlocking C

(TR)

Page 4: Stavelet  Clocks

H0: BCO before blocking capacitors H0: BCO after blocking capacitors

H0: BCO at hybrid termination resistor H0: DCLK at hybrid termination resistor

Page 5: Stavelet  Clocks

H1: BCO before blocking capacitors H1: BCO after blocking capacitors

H1: BCO at hybrid termination resistor H1: DCLK at hybrid termination resistor

Page 6: Stavelet  Clocks

H2: BCO before blocking capacitors H2: BCO after blocking capacitors

H2: BCO at hybrid termination resistor H2: DCLK at hybrid termination resistor

Page 7: Stavelet  Clocks

H3: BCO before blocking capacitors H3: BCO after blocking capacitors

H3: BCO at hybrid termination resistor H3: DCLK at hybrid termination resistor

Page 8: Stavelet  Clocks

H4: BCO before blocking capacitors H4: BCO after blocking capacitors

H4: BCO at hybrid termination resistor H4: DCLK at hybrid termination resistor

Page 9: Stavelet  Clocks

H5: BCO before blocking capacitors H5: BCO after blocking capacitors

H5: BCO at hybrid termination resistor H5: DCLK at hybrid termination resistor

Page 10: Stavelet  Clocks

H6: BCO before blocking capacitors H6: BCO after blocking capacitors

H6: BCO at hybrid termination resistor H6: DCLK at hybrid termination resistor

Page 11: Stavelet  Clocks

H7: BCO before blocking capacitors H7: BCO after blocking capacitors

H7: BCO at hybrid termination resistor H7: DCLK at hybrid termination resistor

Page 12: Stavelet  Clocks

Data Summaries, Notes and SuggestionsDuty

Before CAmp

Before CDuty

After CAmp

After CDuty at

TermAmp at

Term80 DCLK period 1

80 DCLK period 2

80 DCLK period 3

80 DCLK period 4

H0 50.2 164 50.3 143 55.0 765 5.4 5.6 4.9 8.0

H1 50.3 170 50.4 147 53.8 740 5.4 5.6 4.9 8.0

H2 50.2 173 50.4 150 53.4 753 5.4 5.6 4.9 8.0

H3 50.3 179 50.4 153 53.1 776 5.6 5.6 4.7 8.0

H4 50.3 182 50.4 156 53.4 730 5.6 5.6 4.7 8.0

H5 50.4 188 50.4 160 52.4 714 5.1 5.8 5.1 8.0

H6 50.3 192 50.4 160 52.4 716 5.6 5.6 4.9 8.0

H7 50.4 197 50.4 165 51.8 730 5.6 5.6 4.7 8.0

% mV % mV % mV nS nS nS nS

Notes:1) System clock (BCO) is 42 MHz2) Periods 1 and 2 are almost the same (except for H5)3) Period 3 is consistently short: effect of 42MHz clock?4) Period 4 is always 8.0 nS5) Period data read from graphs, error 0.2nS

Suggestions:1) Change to 40MHz clock2) Investigate H5 and one other in more detail3) Seek to determine firing point at BBC input4) Adjust terminations