Solid state relay having a thyristor discharge circuit

Details Solid state relay having a thyristor discharge circuit Solid state relay having a thyristor discharge circuit

H - Electricity

03

K

328/194, 328/114

H03K 17/78 (2006.01) H03K 17/0412 (2006.01) H03K 17/687 (2006.01) H03K 17/785 (2006.01)

Patent

CA 1285033

"Solid State Relay Having a Thyristor Discharge Circuit" ABSTRACT OF THE DISCLOSURE A solid state relay comprises a light-emitting diode (2) for generating radiation in response to forward current supplied thereto and an array (5) of photodiodes optically coupled to the light-emitting diode for generating a voltage in response to radiation from the light-emitting diode. A thyristor (18) is provided having anode and cathode coupled to the gate and substrate electrodes (11a, 11b, 14a, 14b) of a field-effect transistor, respectively. A gate electrode (21) of the thyristor is connected to one end (7) of the photodiode array (5) and the cathode of the thyristor is further connected to the other end (8) of the photodiode array. The voltage generated by the photodiode array is applied to the switching transistor (9, 10) through a diode (17) so that the impedance between the source and drain electrodes of the transistor has a low value in the presence of the voltage and a high value in the absence of the voltage. A voltage photogerated by the array in response to radiation from the light-emitting diode forwardly biases the diode (7) and backwardly biases the thyristor, so that it is applied to the transistor without loss of energy. Upon cessation of the radiation, a voltage difference between the photodiode array and the transistor backwardly biases the diode (7) and forwardly biases the thyristor, providing a low impedance path for rapidly discharging energy stored in the transistor to cause it to turn off.

524392

Affiliated with

Also associated with

Rating

Solid state relay having a thyristor discharge circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Solid state relay having a thyristor discharge circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solid state relay having a thyristor discharge circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1228958