US 7,576,345 B2
Semiconductor relay
Nobuhiro Sato, Tokyo (Japan); Shinya Sato, legal representative; and Tadaaki Sato, Tokyo (Japan)
Assigned to Advantest Corp., Tokyo (Japan)
Filed on Mar. 25, 2008, as Appl. No. 12/79,111.
Claims priority of application No. 2007-083817 (JP), filed on Mar. 28, 2007.
Prior Publication US 2009/0014669 A1, Jan. 15, 2009
Int. Cl. G02B 27/00 (2006.01); H01J 40/14 (2006.01)
U.S. Cl. 250—551  [250/214 R; 327/514] 10 Claims
OG exemplary drawing
 
1. A semiconductor relay comprising:
a power transforming circuit having an input terminal and an output terminal insulated from each other, for outputting from the output terminal an output power corresponding to an input power inputted to the input terminal;
a signal transmitting circuit having an input terminal and an output terminal insulated from each other, for outputting from the output terminal an output signal corresponding to an input signal inputted to the input terminal;
a switching circuit to apply or not to apply the output power outputted from the output terminal of the power transforming circuit, based on the output signal outputted from the output terminal of the signal transmitting circuit; and
a conduction turning-off circuit including a first terminal and a second terminal, for connecting or disconnecting the first terminal and the second terminal, based on whether or not the switching circuit applies the output power.