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FDA Morphosis
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jsilvestre
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Message : #1
RE: FDA Morphosis

xn a écrit :
Bonjour Joël,
s'il y a erreur dans le raisonnement, je suis preneur.
Le raisonnement est tout bête et consiste simplement à transformer un nombre en un rapport cyclique, c'est à dire une durée. Si le nombre (l'échantillon) est encodé sur 16 bits (non signé ou BC2), c'est un compteur 16 bits alimenté par une horloge égale à 65536xFs qui me donne le rapport cyclique.
Quoi qu'il arrive, je n'ai aucunement l'intention de réaliser un convertisseur PCM/PWM, mon discours consistait simplement à dire qu'il est trivial de réaliser ce convertisseur pour peu que la fréquence PWM soit multiple entière de la fréquence d'échantillonnage.


65536x48000 = 3.14GHz et non 3.14MHz.
Si tu veux concurrencer un dac 24 bits, la fréquence requise devient 805GHz.
Trivial???
Avec 3.14MHz la résolution ne saura dépasser 5.5bits.
3MHz c'est énorme pour les mosfets actuels. 400KHz serait plus raisonnable mais à 400KHz la résolution tombe à 3 bits...

Si malgré tout tu as une solution triviale qui te permet d'obtenir une linéarité de 0.0001% dans ces conditions, fais en part aux fabricants des puces ils seront bigrement intéressés!

Joël

29/12/2017 23:10:07
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FDA Morphosis - jeans - 23/12/2017, 18:12:21
RE: FDA Morphosis - Ragnarsson - 23/12/2017, 18:15:07
RE: FDA Morphosis - Dominique - 23/12/2017, 19:03:11
RE: FDA Morphosis - Ragnarsson - 24/12/2017, 00:34:37
RE: FDA Morphosis - escartefigue33 - 26/12/2017, 17:26:25
RE: FDA Morphosis - xn - 26/12/2017, 18:34:51
RE: FDA Morphosis - rliyung - 26/12/2017, 20:48:09
RE: FDA Morphosis - rliyung - 27/12/2017, 12:00:10
RE: FDA Morphosis - escartefigue33 - 27/12/2017, 09:56:18
RE: FDA Morphosis - xn - 27/12/2017, 12:11:53
RE: FDA Morphosis - rliyung - 27/12/2017, 16:40:32
RE: FDA Morphosis - escartefigue33 - 27/12/2017, 12:51:01
RE: FDA Morphosis - Le Relais Sonore - 27/12/2017, 13:24:25
RE: FDA Morphosis - forr - 27/12/2017, 13:33:46
RE: FDA Morphosis - Audio Pavillon - 27/12/2017, 14:05:12
RE: FDA Morphosis - xn - 27/12/2017, 14:42:23
RE: FDA Morphosis - Audio Pavillon - 27/12/2017, 17:35:55
RE: FDA Morphosis - brunop - 27/12/2017, 16:00:14
RE: FDA Morphosis - Le Relais Sonore - 27/12/2017, 16:29:30
RE: FDA Morphosis - escartefigue33 - 27/12/2017, 17:14:40
RE: FDA Morphosis - forr - 27/12/2017, 19:46:41
RE: FDA Morphosis - escartefigue33 - 27/12/2017, 19:56:47
RE: FDA Morphosis - forr - 27/12/2017, 20:33:17
RE: FDA Morphosis - xn - 27/12/2017, 19:33:59
RE: FDA Morphosis - Audio Pavillon - 27/12/2017, 20:01:26
RE: FDA Morphosis - rliyung - 27/12/2017, 21:53:25
RE: FDA Morphosis - xn - 28/12/2017, 11:31:01
RE: FDA Morphosis - rliyung - 28/12/2017, 22:14:24
RE: FDA Morphosis - revilo - 29/12/2017, 12:34:58
RE: FDA Morphosis - xn - 27/12/2017, 20:14:45
RE: FDA Morphosis - escartefigue33 - 28/12/2017, 13:10:46
RE: FDA Morphosis - xn - 28/12/2017, 15:30:57
RE: FDA Morphosis - Le Relais Sonore - 28/12/2017, 15:57:51
RE: FDA Morphosis - escartefigue33 - 28/12/2017, 16:51:53
RE: FDA Morphosis - xn - 28/12/2017, 17:08:19
RE: FDA Morphosis - escartefigue33 - 28/12/2017, 18:07:28
RE: FDA Morphosis - Le Relais Sonore - 28/12/2017, 19:40:46
RE: FDA Morphosis - xn - 28/12/2017, 18:34:13
RE: FDA Morphosis - JM Plantefeve - 29/12/2017, 13:49:52
RE: FDA Morphosis - xn - 29/12/2017, 15:33:22
RE: FDA Morphosis - jsilvestre - 29/12/2017, 18:39:43
RE: FDA Morphosis - thierry38 - 29/12/2017, 15:36:53
RE: FDA Morphosis - xn - 29/12/2017, 15:49:36
RE: FDA Morphosis - thierry38 - 29/12/2017, 17:05:49
RE: FDA Morphosis - JM Plantefeve - 29/12/2017, 17:48:01
RE: FDA Morphosis - xn - 29/12/2017, 17:59:39
RE: FDA Morphosis - xn - 29/12/2017, 19:10:38
RE: FDA Morphosis - jsilvestre - 29/12/2017 23:10:07
RE: FDA Morphosis - JM Plantefeve - 29/12/2017, 19:32:23
RE: FDA Morphosis - xn - 29/12/2017, 19:48:57
RE: FDA Morphosis - JM Plantefeve - 29/12/2017, 20:53:56
RE: FDA Morphosis - xn - 29/12/2017, 21:34:33
RE: FDA Morphosis - jys - 29/12/2017, 22:12:37
RE: FDA Morphosis - xn - 30/12/2017, 12:26:09
RE: FDA Morphosis - jsilvestre - 30/12/2017, 17:57:05
RE: FDA Morphosis - xn - 30/12/2017, 18:50:13
RE: FDA Morphosis - Jean-ClaudeRL - 30/12/2017, 20:18:31
RE: FDA Morphosis - escartefigue33 - 31/12/2017, 09:54:25
RE: FDA Morphosis - Audio Pavillon - 31/12/2017, 16:36:49
RE: FDA Morphosis - narshorn - 31/12/2017, 17:10:48
RE: FDA Morphosis - JM Plantefeve - 31/12/2017, 16:03:58
RE: FDA Morphosis - xn - 02/01/2018, 03:21:55
RE: FDA Morphosis - xn - 31/12/2017, 20:12:24
RE: FDA Morphosis - Audio Pavillon - 31/12/2017, 20:35:58
RE: FDA Morphosis - narshorn - 31/12/2017, 20:46:21
RE: FDA Morphosis - Dominique-Tanguy - 01/01/2018, 09:39:08
RE: FDA Morphosis - Jean-ClaudeRL - 01/01/2018, 10:20:20
RE: FDA Morphosis - narshorn - 01/01/2018, 11:48:11
RE: FDA Morphosis - jeans - 01/01/2018, 11:49:57
RE: FDA Morphosis - Jean-ClaudeRL - 01/01/2018, 11:57:58
RE: FDA Morphosis - escartefigue33 - 01/01/2018, 12:06:50
RE: FDA Morphosis - rliyung - 01/01/2018, 13:15:18
RE: FDA Morphosis - narshorn - 01/01/2018, 19:51:16
RE: FDA Morphosis - narshorn - 01/01/2018, 14:33:45
RE: FDA Morphosis - jys - 01/01/2018, 15:23:11
RE: FDA Morphosis - Grand_Floyd - 01/01/2018, 15:26:52
RE: FDA Morphosis - JM Plantefeve - 01/01/2018, 20:28:24
RE: FDA Morphosis - escartefigue33 - 01/01/2018, 20:36:12
RE: FDA Morphosis - jys - 02/01/2018, 00:33:19
RE: FDA Morphosis - Dominique-Tanguy - 01/01/2018, 20:37:56
RE: FDA Morphosis - JM Plantefeve - 01/01/2018, 20:47:33
RE: FDA Morphosis - Dominique-Tanguy - 02/01/2018, 10:40:35
RE: FDA Morphosis - rliyung - 02/01/2018, 00:56:19
RE: FDA Morphosis - JM Plantefeve - 02/01/2018, 10:10:50
RE: FDA Morphosis - xn - 02/01/2018, 10:41:47
RE: FDA Morphosis - jeans - 02/01/2018, 12:17:38
RE: FDA Morphosis - jys - 03/01/2018, 01:01:15
RE: FDA Morphosis - jeans - 04/01/2018, 12:56:59
RE: FDA Morphosis - jimbee - 05/01/2018, 17:29:26
RE: FDA Morphosis - jeans - 05/01/2018, 17:52:54
RE: FDA Morphosis - xn - 05/01/2018, 20:19:47
RE: FDA Morphosis - jys - 06/01/2018, 02:17:21
RE: FDA Morphosis - narshorn - 06/01/2018, 09:25:20
RE: FDA Morphosis - jeans - 06/01/2018, 12:18:23
RE: FDA Morphosis - narshorn - 07/01/2018, 15:23:06
RE: FDA Morphosis - jimbee - 06/01/2018, 10:09:29
RE: FDA Morphosis - jeans - 07/01/2018, 17:15:53
RE: FDA Morphosis - jeans - 10/01/2018, 18:50:57
RE: FDA Morphosis - JM Plantefeve - 10/01/2018, 21:04:10
RE: FDA Morphosis - jeans - 10/01/2018, 21:57:44
RE: FDA Morphosis - jeans - 10/01/2018, 23:29:47
RE: FDA Morphosis - rliyung - 11/01/2018, 11:53:23
RE: FDA Morphosis - jimbee - 11/01/2018, 14:02:30
RE: FDA Morphosis - jeans - 11/01/2018, 15:50:02
RE: FDA Morphosis - jimbee - 11/01/2018, 19:33:34
RE: FDA Morphosis - xn - 11/01/2018, 08:07:21
RE: FDA Morphosis - escartefigue33 - 11/01/2018, 09:15:31
RE: FDA Morphosis - jeans - 11/01/2018, 12:59:23
RE: FDA Morphosis - xn - 11/01/2018, 21:46:11
RE: FDA Morphosis - jimbee - 12/01/2018, 17:48:09
RE: FDA Morphosis - thierry38 - 13/01/2018, 16:57:59
RE: FDA Morphosis - jeans - 13/02/2018, 15:28:50
RE: FDA Morphosis - jm88 - 14/02/2018, 13:36:39
RE: FDA Morphosis - jeans - 14/02/2018, 16:14:36
RE: FDA Morphosis - jm88 - 15/02/2018, 13:27:25
RE: FDA Morphosis - jeans - 16/02/2018, 19:01:25
RE: FDA Morphosis - narshorn - 16/02/2018, 19:16:39
RE: FDA Morphosis - calivin - 16/02/2018, 19:40:10
RE: FDA Morphosis - jm88 - 16/02/2018, 20:24:09
RE: FDA Morphosis - folkdeath95 - 17/02/2018, 13:12:37
RE: FDA Morphosis - narshorn - 17/02/2018, 11:52:25
RE: FDA Morphosis - thierry38 - 17/02/2018, 13:06:31
RE: FDA Morphosis - jm88 - 17/02/2018, 13:48:36
RE: FDA Morphosis - thierry38 - 17/02/2018, 15:24:57
RE: FDA Morphosis - jm88 - 18/02/2018, 09:43:48
RE: FDA Morphosis - forr - 18/02/2018, 13:35:26
RE: FDA Morphosis - jm88 - 18/02/2018, 17:43:59
RE: FDA Morphosis - forr - 18/02/2018, 18:39:32
RE: FDA Morphosis - jm88 - 18/02/2018, 22:13:59
RE: FDA Morphosis - forr - 19/02/2018, 01:48:05
RE: FDA Morphosis - jm88 - 19/02/2018, 09:53:24
RE: FDA Morphosis - rliyung - 18/02/2018, 09:55:14
RE: FDA Morphosis - Dominique-Tanguy - 18/02/2018, 10:10:26
RE: FDA Morphosis - jm88 - 18/02/2018, 13:28:06
RE: FDA Morphosis - Dominique-Tanguy - 18/02/2018, 14:20:27
RE: FDA Morphosis - folkdeath95 - 18/02/2018, 15:46:59
RE: FDA Morphosis - forr - 18/02/2018, 17:32:01
RE: FDA Morphosis - jm88 - 18/02/2018, 17:40:31
RE: FDA Morphosis - forr - 18/02/2018, 18:52:02
RE: FDA Morphosis - jm88 - 18/02/2018, 22:16:59
RE: FDA Morphosis - Grand_Floyd - 19/02/2018, 09:44:10
RE: FDA Morphosis - jm88 - 19/02/2018, 09:55:55
RE: FDA Morphosis - forr - 19/02/2018, 12:54:34
RE: FDA Morphosis - jm88 - 19/02/2018, 10:07:52
RE: FDA Morphosis - escartefigue33 - 18/02/2018, 17:50:39
RE: FDA Morphosis - narshorn - 18/02/2018, 18:03:41
RE: FDA Morphosis - escartefigue33 - 18/02/2018, 18:54:30
RE: FDA Morphosis - jys - 18/02/2018, 18:17:32
RE: FDA Morphosis - JM Plantefeve - 18/02/2018, 20:53:59
RE: FDA Morphosis - escartefigue33 - 18/02/2018, 21:58:21
RE: FDA Morphosis - xn - 18/02/2018, 22:34:45
RE: FDA Morphosis - jm88 - 19/02/2018, 09:33:01
RE: FDA Morphosis - jys - 19/02/2018, 01:02:37
RE: FDA Morphosis - Audio Pavillon - 19/02/2018, 11:20:18
RE: FDA Morphosis - jm88 - 19/02/2018, 20:55:28
RE: FDA Morphosis - Grand_Floyd - 19/02/2018, 12:55:34
RE: FDA Morphosis - Audio Pavillon - 19/02/2018, 15:04:54
RE: FDA Morphosis - escartefigue33 - 19/02/2018, 16:04:23
RE: FDA Morphosis - Grand_Floyd - 19/02/2018, 17:08:42
RE: FDA Morphosis - JM Plantefeve - 19/02/2018, 21:08:30
RE: FDA Morphosis - escartefigue33 - 19/02/2018, 21:27:41
RE: FDA Morphosis - narshorn - 19/02/2018, 23:01:48
RE: FDA Morphosis - jeans - 24/02/2018, 22:19:35
RE: FDA Morphosis - jimbee - 09/04/2018, 17:30:14
RE: FDA Morphosis - narshorn - 09/04/2018, 18:49:20
RE: FDA Morphosis - Jerome775 - 28/09/2018, 17:26:46
RE: FDA Morphosis - jmg - 28/09/2018, 20:11:46
RE: FDA Morphosis - Jerome775 - 29/09/2018, 17:49:42
RE: FDA Morphosis - JM Plantefeve - 10/12/2018, 20:48:29
RE: FDA Morphosis - jeans - 11/12/2018, 13:07:48
RE: FDA Morphosis - calivin - 11/12/2018, 13:44:36

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