ELECTRONIC CIRCUIT AND MOBILE TERMINAL DEVICE USING THE SAME
An electronic circuit includes a first digital circuit, a second digital circuit, a first detection part to detect a first voltage value which is an operation voltage of the first digital circuit, a second detection part to detect a second voltage value which is an operation voltage of the second digital circuit, a comparison part to compare the first voltage value and the second voltage value, and a connection/disconnection part to perform connection and disconnection between the first digital circuit and the second digital circuit depending on a comparison result acquired by the comparison part.
1 . An electronic circuit, comprising
a first digital circuit;
a second digital circuit;
a first detection part to detect a first voltage value which is an operation voltage of the first digital circuit;
a second detection part to detect a second voltage value which is an operation voltage of the second digital circuit;
a comparison part to compare the first voltage value and the second voltage value; and
a connection/disconnection part to perform the connection and the disconnection between the first digital circuit and the second digital circuit depending on a comparison result acquired by the comparison part.
2 . The electronic circuit according to claim 1 , wherein the connection/disconnection part is configured to disconnect between the first digital circuit and the second digital circuit when a comparison result in which the first voltage value is equal to or more than the second voltage value is acquired by the comparison part.
3 . The electronic circuit according to claim 1 , wherein the connection/disconnection part is configured to connect between the first digital circuit and the second digital circuit when a comparison result in which the second voltage value is more than the first voltage value or more is acquired by the comparison part.
4 . The electronic circuit according to claim 1 ,
further comprising a condenser which functions as a power source for backup of the second digital circuit.
5 . The electronic circuit according to claim 4 , wherein the condenser is charged by the second voltage value.
6 . The electronic circuit according to claim 4 , wherein the power source for backup is configured to drive a real time clock.
7 . A mobile terminal device comprising the electronic circuit as recited in claim 1 .