Patent ID: 9525382
Filing Date: 2016-12-20
CPC Classification: H03B,H03K,H03L

Claim Text:
1. An oscillation circuit, comprising: an electrical current generating portion configured to generate an electrical current having an oscillation frequency decreasing as an amplitude thereof is decreased, said electrical current generating portion including an inverter having a first input terminal and a first output terminal, said inverter configured to invert a level of a voltage input into the first input terminal so that the inverter outputs the voltage from the first output terminal; a control voltage generating portion configured to generate a control voltage having a magnitude decreasing as a magnitude of a power source voltage is decreased; an RC circuit connected to the first output terminal of the inverter, said RC circuit including a capacitor charging or discharging the electrical current; a Schmitt trigger circuit configured to receive a terminal voltage from the capacitor as an input voltage, and to supply an output voltage to the first input terminal of the inverter; and an electrical current control portion, wherein said electrical current control portion includes a second input terminal connected to the electrical current generating portion for receiving the electrical current; a control terminal connected to the control voltage generating portion for receiving the control voltage; and a second output terminal, and said electrical current control portion is configured to reduce the amplitude of the electrical current flowing between the second input terminal and the second output terminal as the magnitude of the control voltage is decreased.