Patent ID: 11888499
Assignee: SEIKO EPSON CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 0:
1. A transition-state output device comprising:
a ring oscillator circuit starting to oscillate based on a trigger signal;
a state machine changing in state according to a change in state of the ring oscillator circuit;
a transition-state acquisition section acquiring and holding state information including a signal output from the ring oscillator circuit and a signal output from the state machine, synchronously with a reference signal; and
an internal-state calculation section calculating an internal state corresponding to a number of changes in state of the ring oscillator circuit, based on the state information held by the transition-state acquisition section, wherein
a time until the internal state, after transitioning from a first internal state to a second internal state, transitions to the first internal state again is longer than a time interval of updating the state information held by the transition-state acquisition section.