Abstract: A laminate type LC composite device has a coil connected in series between an input electrode and an output electrode, and a capacitor connected in parallel between the input electrode and the output electrode. Further, a micro coil is connected to the coil in series. The coil has an inductance of L and a stray capacitance of C, and the micro coil has an inductance of L' and a stray capacitance of C'. The inductances L and L', and the stray capacitances C and C' fulfill the conditions: LC>L'C', to thereby increase the high-frequency characteristics and the insertion loss in a high frequency area of the LC composite device.

Abstract: An image heating apparatus includes a heater; a heat transmitting member for transmitting the heat from the heater to an unfixed toner image while moving in contact with a recording material bearing the unfixed image; a pressure roller for forming a nip between the heat transmitting member and itself; wherein the heat transmitting member has a conductive surface; the pressure roller has a conductive core member; and wherein the image heating apparatus further contains a rotating conductive member on the conductive core material in contact with the conductive surface.

Abstract: An image forming apparatus includes a fixing heater driven by a voltage supplied from a commercial power supply, a transformer for transforming the voltage supplied from the commercial power supply into a predetermined voltage, and supplying the predetermined voltage to a load in the apparatus, and a controller for detecting the voltage transformed by the transformer, and controlling energization to the fixing heater.

Abstract: An image forming apparatus, which is capable of obtaining high quality images, having a recording member on which a latent image is formed, a charging voltage generating portion which is positioned in contact with the recording member for the purpose of applying charging voltage containing an AC component to the recording member and from which said charging voltage is supplied, an application device for applying an AC component having a frequency, which is different from that of the AC component of the charging voltage, to the recording member, an electric current value control circuit for detecting an output AC value of the charging voltage generating portion so as to make the output AC value to be a predetermined value, and an erroneous operation preventing circuit for preventing an erroneous operation of the electric current value control circuit taken place due to an introduction of the AC component applied by the application device into the charging voltage generating portion.