Square wave switching circuit having sharp turn-on and turn-off characteristics

• US 3,405,352 A
• Filed: 10/21/1965
• Issued: 10/08/1968
• Est. Priority Date: 10/21/1965
• Status: Expired due to Term

• Current Assignee: Richard J. Wondra
• Original Assignee: Richard J. Wondra
• Inventors: Wondra, Richard J.
• Application Number:
  US04/499,443
• Time in Patent Office: 1,083 Days
• US Class Current: 324/430
• CPC Class Codes: G01R 27/02 Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant by measuring phase angle only G01R25/00
• CPC Class Codes: H01H 9/542 Contacts shunted by static switch means
• CPC Class Codes: H01M 8/04559 of fuel cell stacks
• CPC Class Codes: H01M 8/04589 of fuel cell stacks
• CPC Class Codes: H01M 8/04955 Shut-off or shut-down of fuel cells
• CPC Class Codes: H01M 8/04992 characterised by the implementation of mathematical or computational algorithms, e.g. feedback control loops, fuzzy logic, neural networks or artificial intelligence
• CPC Class Codes: H03K 3/351 the devices being unijunction transistors H03K3/352 takes precedence
• CPC Class Codes: Y02E 60/50 Fuel cells

Claims