Patents Assigned to Mullard Limited - Justia Patents Search

Patents Assigned to Mullard Limited

Semiconductor timing device with radioactive material at the floating gate electrode of an insulated-gate field-effect transistor

Patent number: 4275405

Abstract: A semiconductor timing device having a charge storage region, the charge state of which may be detected by field effect action, the charge storage region containing radioactive material which decays by emitting charged nuclear particles, so that the charge state of the charge storage region varies progressively with time.

Type: Grant

Filed: November 16, 1976

Date of Patent: June 23, 1981

Assignee: Mullard Limited

Inventor: John M. Shannon