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1. WO2020112413 - PS15 BASE CURRENT SAMPLING IN SYNCHRONOUS MODE

Publication Number WO/2020/112413
Publication Date 04.06.2020
International Application No. PCT/US2019/062019
International Filing Date 18.11.2019
IPC
G08C 19/02 2006.01
GPHYSICS
08SIGNALLING
CTRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
19Electric signal transmission systems
02in which the signal transmitted is magnitude of current or voltage
H04B 1/38 2015.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/-H04B13/123; Details of transmission systems not characterised by the medium used for transmission
38Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
CPC
H03K 19/20
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
19Logic circuits, i.e. having at least two inputs acting on one output
20characterised by logic function, e.g. AND, OR, NOR, NOT circuits
H03K 5/24
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
5Manipulating of pulses not covered by one of the other main groups of this subclass
22Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
24the characteristic being amplitude
H04B 1/40
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
38Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
40Circuits
Applicants
  • TEXAS INSTRUMENTS INCORPORATED [US]/[US]
  • TEXAS INSTRUMENTS JAPAN LIMITED [JP]/[JP] (JP)
Inventors
  • EASWARAN, Sri Navaneethakrishnan
  • LEKAN, Ted F.
  • ZROKA, Michael J.
  • ROLLMAN, Darren J.
Agents
  • ABRAHAM, Ebby
  • BASSUK, Lawrence
Common Representative
  • TEXAS INSTRUMENTS INCORPORATED
Priority Data
16/521,17024.07.2019US
62/771,69727.11.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PS15 BASE CURRENT SAMPLING IN SYNCHRONOUS MODE
(FR) ÉCHANTILLONNAGE DE COURANT DE BASE DE PS15 EN MODE SYNCHRONE
Abstract
(EN)
Multiple sensors are coupled (405) to a first pin (Pl) of a PSI5 transceiver to receive a sensor bus signal (VCEx). A Manchester decoder is coupled (410) to a second pin (P2) and a battery (UBAT) is coupled (415) to a third pin (P3). A comparator receives (420, 425) a first voltage (VI) that is proportional to a current on the sensor bus signal and a second voltage (V2) that is proportional to a base current on the sensor bus signal and sends (430) a data output signal (Rx) to the second pin. A sample-and-hold circuit (S2 and Cl) captures (435) a third voltage (Vsb) used to effect the second voltage responsive to a high value on a base current sampling signal (CtrlS). A base-current-renewal circuit detects (440) edge transitions on the data output signal and when the data output signal has no edge transitions for a period of time greater than a gap time defined in a PSI5 standard, sets the base current sampling signal high.
(FR)
Selon l'invention, de multiples capteurs sont couplés (405) à une première broche (P1) d'un émetteur-récepteur PSI5 pour recevoir un signal de bus de capteur (VCEx). Un décodeur Manchester est couplé (410) à une deuxième broche (P2) et une batterie (UBAT) est couplée (415) à une troisième broche (P3). Un comparateur reçoit (420, 425) une première tension (V1) qui est proportionnelle à un courant sur le signal de bus de capteur et une seconde tension (V2) qui est proportionnelle à un courant de base sur le signal de bus de capteur et envoie (430) un signal de sortie de données (Rx) à la deuxième broche. Un circuit d'échantillonnage et de maintien (S2 et C1) capture (435) une troisième tension (Vsb) servant à obtenir la deuxième tension sensible à une valeur élevée sur un signal d'échantillonnage de courant de base (CtrlS). Un circuit de renouvellement de courant de base détecte (440) des transitions de front du signal de sortie de données et, lorsque le signal de sortie de données ne comporte pas de transition de front pendant une période de temps supérieure à un temps d'intervalle défini selon une norme PSI5, fixe à l'état haut le signal d'échantillonnage de courant de base.
Also published as
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