IMPROVED TYPE ELECTRONIC DEVICE AND ITS APPLICATION

PURPOSE:To obtain an electronic device having simple and clear operating state and manufactured easily by using a polyester capacitor only to a power supply section and using an electron tube without using a mica for a spacer and high current fluctuating factor as an active element. CONSTITUTION:The electronic device is obtained by using a polyester capacitor only for the power supply section and using an electron tube having high current fluctuating factor (gm) not using mica for the spacer of the electrode support as the active element. For example, as a sound amplifier being a basic element in the electronic circuit, an operational amplifier being a complicated circuit using the integrated circuit is used mainly at present. In using this system, however, the operating state is simple and clear, the operation is easy, the electronic device is more solid electrically than semiconductors and is operated very close to an ideal amplifier in the theory of electronic circuit, various troubles caused by various elements so far are solved and the reliability is improved.