Length matching for parallel buses in PCB Design - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to calculate the total length of a bus segment.

PCB Design

total_length = sum([1])

Drag options to blanks, or click blank then click option'

Asegment_lengths

Bbus_width

Ctrace_width

Dnum_segments

Attempts:

3 left

💡 Hint

Common Mistakes

Using bus width instead of segment lengths

Using number of segments instead of lengths

The total length is the sum of all segment lengths in the bus.

2fill in blank

medium

Complete the code to find the maximum length among parallel bus traces.

PCB Design

max_length = max([1])

Drag options to blanks, or click blank then click option'

Asegment_widths

Bnum_traces

Ctrace_lengths

Dbus_widths

Attempts:

3 left

💡 Hint

Common Mistakes

Using widths instead of lengths

Using number of traces instead of lengths

The maximum length is found by taking the max of all trace lengths.

3fill in blank

hard

Fix the error in the code to calculate the length difference between traces.

PCB Design

length_diff = [1] - min(trace_lengths)

Drag options to blanks, or click blank then click option'

Atrace_lengths[0]

Bmax(trace_lengths)

Clen(trace_lengths)

Dsum(trace_lengths)

Attempts:

3 left

💡 Hint

Common Mistakes

Using sum instead of max

Using length of list instead of max length

The length difference is the difference between the longest and shortest trace lengths.

4fill in blank

hard

Fill both blanks to create a dictionary of trace length differences for each trace.

PCB Design

length_diffs = {trace: [1] - [2] for trace in range(len(trace_lengths))}

Drag options to blanks, or click blank then click option'

Amax(trace_lengths)

Bmin(trace_lengths)

Ctrace_lengths[trace]

Dsum(trace_lengths)

Attempts:

3 left

💡 Hint

Common Mistakes

Subtracting max length instead of min

Using sum instead of individual trace length

For each trace, subtract the shortest trace length from its length to get the difference.

5fill in blank

hard

Fill both blanks to filter traces with length difference greater than a threshold.

PCB Design

filtered_traces = {trace: diff for trace, diff in length_diffs.items() if diff [1] [2]

Drag options to blanks, or click blank then click option'

A>

Bthreshold

C<

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using less than instead of greater than

Comparing to zero instead of threshold

We want traces where the length difference is greater than the threshold.