In a high voltage detection circuit, a high voltage detection portion 10 constituted with, for instance, two constant voltage circuits 10a and 10c and a current mirror portion 10b, a strobe input 20 and an output communication device 30 are provided. This high voltage detection circuit outputs a high...http://www.google.fr/patents/US5875245?utm_source=gb-gplus-shareBrevet US5875245 - High voltage detection circuit, bell signal detection circuit and non-ringing reception detection circuit
High voltage detection circuit, bell signal detection circuit and non ...
