Capacitor - Revision history

Marco-Guerini: /* Capacitors in THAT */

2025-01-23T10:52:19Z

Capacitors in THAT

← Older revision		Revision as of 10:52, 23 January 2025
Line 29:		Line 29:
	Usually, the stabilization effect is accomplished using the smaller 100pF capacitors, leaving the 100nF ones to be used as feedback elements for additional integrators.		Usually, the stabilization effect is accomplished using the smaller 100pF capacitors, leaving the 100nF ones to be used as feedback elements for additional integrators.

	The capacitors internal to the [integrators] are 1nF and 100nF. Normally, the 1nF is connected across to produce a [Beta] of ~~'''~~(1M x 1nF = 1000 (RC product being 10^-3)~~'''~~. By instead jumpering the output across the ''Slow''' contact, a Beta of 10 is obtained. Of course, the actual value of the feedback capacitor in that case would be 101nF, but it's precise enough for THAT's educational, qualitative scope.		The capacitors internal to the [integrators] are 1nF and 100nF. Normally, the 1nF is connected across to produce a [Beta] of (1M x 1nF = 1000 (RC product being 10^-3). By instead jumpering the output across the ''Slow'' contact, a Beta of 10 is obtained. Of course, the actual value of the feedback capacitor in that case would be 101nF, but it's precise enough for THAT's educational, qualitative scope.

Marco-Guerini: Added THAT cap infos and usage

2025-01-23T10:51:51Z

Added THAT cap infos and usage

← Older revision		Revision as of 10:51, 23 January 2025
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	== Capacitors in THAT ==		== Capacitors in THAT ==

			THAT possess a number of capacitors, either uncommitted or internal to the integrators.

			The uncommitted (free) ones are five in number, three 100 picofarads and two 100 nanofarads. These are used to either convert an [Open Amplifier] to an integrator, or to help stabilize an open amplifier used to implement inverse functions.
			Usually, the stabilization effect is accomplished using the smaller 100pF capacitors, leaving the 100nF ones to be used as feedback elements for additional integrators.

			The capacitors internal to the [integrators] are 1nF and 100nF. Normally, the 1nF is connected across to produce a [Beta] of '''(1M x 1nF = 1000 (RC product being 10^-3)'''. By instead jumpering the output across the ''Slow''' contact, a Beta of 10 is obtained. Of course, the actual value of the feedback capacitor in that case would be 101nF, but it's precise enough for THAT's educational, qualitative scope.

Marco-Guerini: /* Usage in Analog Computers */

2025-01-23T10:41:45Z

Usage in Analog Computers

← Older revision		Revision as of 10:41, 23 January 2025
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	First and foremost, Capacitors can be defined as the 'heart' of the [[Integrator]].		First and foremost, Capacitors can be defined as the 'heart' of the [[Integrator]].
	By taking a simple [[Summer]] and taking out its feedback resistor, which has a linear relationship betwixt current and voltage (I = V/R, ''Ohm's Law''), and substituting it with a capacitor an integrator is obtained.		By taking a simple [[Summer]] and taking out its feedback resistor, which has a linear relationship betwixt current and voltage (I = V/R, ''Ohm's Law''), and substituting it with a capacitor an integrator is obtained.
	The relationship ~~betwixt~~ current and voltage in a capacitor is, in fact, I = C*(dV/dt) and shows a time-dependent behaviour which leads, eventually, to the normal Integrator transfer function. For more details, see the related [[Integrator]] page.		The relationship between current and voltage in a capacitor is, in fact, I = C*(dV/dt) and shows a time-dependent behaviour which leads, eventually, to the normal Integrator transfer function. For more details, see the related [[Integrator]] page.

	Second, capacitors are used in Track & Store circuits.		Second, capacitors are used in Track & Store circuits.

			A track and store circuit uses the capacitor to "memorize" a signal at a certain point in time, effectively saving it.

	== Capacitors in THAT ==		== Capacitors in THAT ==

Marco-Guerini: Added info on Capacitor usage in Analog Computer, WIP

2024-12-30T14:46:18Z

Added info on Capacitor usage in Analog Computer, WIP

← Older revision		Revision as of 14:46, 30 December 2024
Line 13:		Line 13:

	== Usage in Analog Computers ==		== Usage in Analog Computers ==

			First and foremost, Capacitors can be defined as the 'heart' of the [[Integrator]].
			By taking a simple [[Summer]] and taking out its feedback resistor, which has a linear relationship betwixt current and voltage (I = V/R, ''Ohm's Law''), and substituting it with a capacitor an integrator is obtained.
			The relationship betwixt current and voltage in a capacitor is, in fact, I = C*(dV/dt) and shows a time-dependent behaviour which leads, eventually, to the normal Integrator transfer function. For more details, see the related [[Integrator]] page.

			Second, capacitors are used in Track & Store circuits.

	== Capacitors in THAT ==		== Capacitors in THAT ==

Marco-Guerini: Created page on Capacitors, work in progress

2024-12-28T18:52:10Z

Created page on Capacitors, work in progress

New page

A '''Capacitor''' is one of the fundamental four passive electronic components, together with Resistors, Inductors and Memristors.

It's widely used in Analog computers as the key element in the [[Integrator]], [[Track & Store Circuit]] and as stabilizer in uncommitted or [[Open Amplifiers]].

It is capable of storing a certain amount of electrical charge (measured in Coulombs) depending on a propriety called Capacitance. The larger the capacitance, the larger the amount of charge stored and longer the time needed to charge.

An analogy useful to understand capacitor behaviour is by comparing it to a bucket. The larger in volume the bucket, the longer the time to fill it by a pipe carrying so many liters per second. The amount of water is definite and proportional to the volume of the bucket itself. The bucket can also be emptied instantly, akin to how capacitors can discharge instantly by being short-circuited.

== Basics of Capacitors ==

A capacitor in its most basic form is created by putting two metal plates, called armatures or simply 'plates' facing each other.

== Usage in Analog Computers ==

== Capacitors in THAT ==