LibrePDK - Revision history

Leviathan: /* Pad Cells */

2026-05-29T11:31:28Z

Pad Cells

← Older revision		Revision as of 11:31, 29 May 2026
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	== Pad Cells ==		== Pad Cells ==
	Last but not least: It contains the [[Pad Cell Generator]] which produces beauties like this		Last but not least: It contains the [[Pad Cell Generator]] which produces beauties like this
	[[File:~~Io cell 20mA~~@~~1.2V~~.png\|none\|thumb]]		[[File:30mA SG13G2@3V3 v2.png\|none\|thumb\|356x356px]]

2026-05-26T02:35:29Z

← Older revision		Revision as of 02:35, 26 May 2026
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	Libre PDK may also decide to just generate a single gate transistor in cases where there's very little power involved		Libre PDK may also decide to just generate a single gate transistor in cases where there's very little power involved
	[[File:Single Gate Example.png\|none\|thumb\|300x300px\|Example of a single gate transistor]]		[[File:Single Gate Example.png\|none\|thumb\|300x300px\|Example of a single gate transistor]]

			== Pad Cells ==
			Last but not least: It contains the [[Pad Cell Generator]] which produces beauties like this
			[[File:Io cell 20mA@1.2V.png\|none\|thumb]]

2026-05-26T01:14:34Z

Diodes

← Older revision		Revision as of 01:14, 26 May 2026
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	== Diodes ==		== Diodes ==
			[[File:Diode Example.png\|none\|thumb\|300x300px\|Example of a diode]]
	While normal fingered diodes now have been implemented Schottky diodes still are work in progress.		While normal fingered diodes now have been implemented Schottky diodes still are work in progress.

			== Schottky diodes ==
			Those are not yet implemented

	== Transistors ==		== Transistors ==

2026-05-26T01:10:57Z

Transistors

← Older revision		Revision as of 01:10, 26 May 2026
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	Additionally, you can also overwrite the thermal budget which usually is assumed to be for an internal circuit which isn't bonded directly to the outside.		Additionally, you can also overwrite the thermal budget which usually is assumed to be for an internal circuit which isn't bonded directly to the outside.

			When LibrePDK calculates that electron migration and thermal budget constraints don't allow for a single gate transistor it will dynamically create a fingered structure, either with bulk and source connected or not with the proper guard ring.
			[[File:Fingered Transistor.png\|none\|thumb\|300x300px\|Example of a fingered transistor]]
			Libre PDK may also decide to just generate a single gate transistor in cases where there's very little power involved
			[[File:Single Gate Example.png\|none\|thumb\|300x300px\|Example of a single gate transistor]]

2026-05-26T00:44:24Z

← Older revision		Revision as of 00:44, 26 May 2026
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	'''The meander here is 200 Ohms for GF180A@3.3V'''[[File:LibrePDK Meander Example.png\|none\|thumb\|300x300px]]'''The meander here is 500 Ohms for GF180A@3.3V'''[[File:Strip Resistor Example.png\|none\|thumb\|300x300px]]		'''The meander here is 200 Ohms for GF180A@3.3V'''[[File:LibrePDK Meander Example.png\|none\|thumb\|300x300px]]'''The meander here is 500 Ohms for GF180A@3.3V'''[[File:Strip Resistor Example.png\|none\|thumb\|300x300px]]

			== Diodes ==
			While normal fingered diodes now have been implemented Schottky diodes still are work in progress.

	== Transistors ==		== Transistors ==

2026-05-26T00:42:29Z

Resistors

← Older revision		Revision as of 00:42, 26 May 2026
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	LibrePDK automatically adds a guard ring around any resistor which should be on a well		LibrePDK automatically adds a guard ring around any resistor which should be on a well

	~~===~~ The meander here is 200 Ohms for GF180A@3.3V ~~===~~		'''The meander here is 200 Ohms for GF180A@3.3V'''[[File:LibrePDK Meander Example.png\|none\|thumb\|300x300px]]'''The meander here is 500 Ohms for GF180A@3.3V'''[[File:Strip Resistor Example.png\|none\|thumb\|300x300px]]
	[[File:LibrePDK Meander Example.png\|none\|thumb\|300x300px]]

	~~===~~ The meander here is 500 Ohms for GF180A@3.3V ~~===~~
	[[File:Strip Resistor Example.png\|none\|thumb\|300x300px]]

	== Transistors ==		== Transistors ==

2026-05-26T00:41:57Z

← Older revision		Revision as of 00:41, 26 May 2026
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	IdeaPlaceExPy requires the Python system headers to be installed and the virtual env has to match the Python version with which it was compiled.		IdeaPlaceExPy requires the Python system headers to be installed and the virtual env has to match the Python version with which it was compiled.

	=== ~~'''~~Using LibrePDK in a Virtual Environment~~'''~~ ===		=== Using LibrePDK in a Virtual Environment ===
	It is recommended to use LibrePDK in a Python virtual environment to avoid dependency conflicts with		It is recommended to use LibrePDK in a Python virtual environment to avoid dependency conflicts with
	system-wide Python packages.		system-wide Python packages.

2026-05-26T00:41:05Z

Components

← Older revision		Revision as of 00:41, 26 May 2026
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	= Components =		= Components =
	LibrePDK provides generators for the basic components usually found within a VLSI/ULSI design, such as resistors, capacitors and transistors.		LibrePDK provides generators for the basic components usually found within a VLSI/ULSI design, such as resistors, capacitors, diodes and transistors.

	== Capacitors ==		== Capacitors ==

2026-05-26T00:40:36Z

Resistors

← Older revision		Revision as of 00:40, 26 May 2026
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	== Transistors ==		== Transistors ==
	~~For now there~~'s only ~~single~~ gate ~~transistors (~~fingered ~~transistors are still WIP)~~		In order to make sure that our transistors don't go up in flame, we have to take the hot carrier migration and thermal budget into consideration when we decide what transistor to use and whether it should have only one gate or should be fingered.

			LibrePDK takes care of this and chooses the right transistor with the right amount of fingers for you based on the target operating voltage and current you plan to pump through it, you provide.

			Additionally, you can also overwrite the thermal budget which usually is assumed to be for an internal circuit which isn't bonded directly to the outside.

2026-05-26T00:36:05Z

Resistors

← Older revision		Revision as of 00:36, 26 May 2026
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	There's two types of resistor structures available: Meander and strip resistors		There's two types of resistor structures available: Meander and strip resistors

	==== The meander here is 200 Ohms for GF180A@3.3V ====		LibrePDK automatically adds a guard ring around any resistor which should be on a well

			=== The meander here is 200 Ohms for GF180A@3.3V ===
	[[File:LibrePDK Meander Example.png\|none\|thumb\|300x300px]]		[[File:LibrePDK Meander Example.png\|none\|thumb\|300x300px]]

			=== The meander here is 500 Ohms for GF180A@3.3V ===
			[[File:Strip Resistor Example.png\|none\|thumb\|300x300px]]

	== Transistors ==		== Transistors ==
	For now there's only single gate transistors (fingered transistors are still WIP)		For now there's only single gate transistors (fingered transistors are still WIP)