Finnegan, Henderson, Farabow, Garrett & Dunner
CR Oscillator having constant current charging source
 A CR oscillation circuit is provided which includes inverters which are connected in series and whose operating current paths between a power source terminal and a ground terminal are connected in series with a constant current source. In certain embodiments, a resistor is connected between the output terminal of one inverter and the input terminal of the first inverter, and a capacitor is connected between the output terminal of another inverter and the input terminal of the first inverter. The CR oscillation circuit further has a constant current source connected in series with the operating current path of said inverters between the power source terminal and the ground terminal. In other embodiments, the resistor and capacitor are connected in parallel and to the input of an inverter. 
Tokyo Shibaura Denki Kabushiki Kaisha
H H Y
H03K H03K Y10S
inventional inventional additional
Yasoji Kenji
Suzuki Matsuo