EP 0619925 A4 19950719 - INTEGRATOR HAVING SWITCHED HYSTERESIS FOR PROXIMITY SWITCHES.
Title (en)
INTEGRATOR HAVING SWITCHED HYSTERESIS FOR PROXIMITY SWITCHES.
Title (de)
INTEGRATOR MIT GESCHALTETER HYSTERESE FÜR ANNÄHERUNGSSCHALTER.
Title (fr)
AMELIORATIONS APPORTEES AUX INTERRUPTEURS DE PROXIMITE.
Publication
Application
Priority
- GB 9127572 A 19911231
- US 9211231 W 19921228
Abstract (en)
[origin: WO9313599A1] The present invention provides an integrator (5) with switched hysteresis for inductive proximity switches comprising a reference current source (IREF) connected between a reference voltage supply rail and a first side of a current mirror, a second side of the current mirror being connected to a proximity switch rectifier, the first side of the current mirror being connected to a capacitor (CINT) and to one input of a two input comparator, the other input of the comparator being held at a threshold level, wherein a fixed hysteresis current source IHYST is provided in parallel with the current reference source IREF, the fixed hysteresis current source IHYST producing a switchable current which is a fixed proportion of the current of the current reference source (IREF), the fixed hysteresis current source IHYST being switched on (off) when a target is detected and off (on) when no target is detected. This invention provides for reduction of effects detrimental to the speed of operation of the switch.
IPC 1-7
IPC 8 full level
H03K 3/0233 (2006.01); H03K 17/945 (2006.01)
CPC (source: EP)
H03K 3/02337 (2013.01); H03K 17/945 (2013.01)
Citation (search report)
- [X] EP 0458044 A2 19911127 - BOSCH GMBH ROBERT [DE]
- [A] PATENT ABSTRACTS OF JAPAN vol. 9, no. 173 (E - 329)<1896> 18 July 1985 (1985-07-18)
- See references of WO 9313599A1
Designated contracting state (EPC)
DE FR
DOCDB simple family (publication)
WO 9313599 A1 19930708; EP 0619925 A1 19941019; EP 0619925 A4 19950719; GB 2263549 A 19930728; GB 2263549 B 19960403; GB 9127572 D0 19920219
DOCDB simple family (application)
US 9211231 W 19921228; EP 93902771 A 19921228; GB 9127572 A 19911231