Simple Ring Detector


Posted on Jun 15, 2012

This circuit detects the 20-Hz approximately 86-Vrms ring signal on telephone lines and initiates action in an electri


Simple Ring Detector
Click here to download the full size of the above Circuit.

cally isolated circuit. Typical applications include automatic answering equipment, interconnect/interface and key systems. The detector is the simplest and provides about a 1-mA signal for a 7-mA line, which loads for 0.1 s after the start of the ring signal. The time-delay capacitor provides a degree of dial-tap and click suppression, and filters out the zero crossing of the 20-Hz wave.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

InfraRed Detector (PIC12F629)
Mini-stereo
Uninterruptable-supply
am transmitter double side band
Decibels Meter Circuit Using LM324
MC34017A Telephone Tone Ringer Bipolar Linear/I2L
WS2512 4 X 4 Power Amplifier Module
Odd application of neon glow lamps
1998 tracker: 1.6 multifuel port injection replaced plugs cap rotor
vusb
High-frequency signal output amplifier
Square transform circuit diagram



Top