Abstract: In an image reading apparatus for reading an original image using a light source containing a plurality of color components, a control pulse for dimming the light source is generated by pulse-width modulation symmetrically with respect to a reference timing (for example, the central position in one storage time or the storage start timing) in one predetermined storage time of a line sensor.

Abstract: In an image reading apparatus for reading an original image using a light source containing a plurality of color components, a control pulse for dimming the light source is generated by pulse-width modulation symmetrically with respect to a reference timing (for example, the central position in one storage time or the storage start timing) in one predetermined storage time of a line sensor.

Abstract: A semiconductor integrated circuit system includes first and second semiconductor devices formed on a substrate and required to have properties the same as each other in operation. The first and second semiconductor devices respectively includes first and second channel regions arranged in a surface of the substrate, and first and second gate electrodes disposed on the first and second channel regions via gate insulating films. A relaxing structure is arranged to reduce fluctuations in the properties of the first and second semiconductor devices, the fluctuations being caused by the electrical effects of plasma when a plasma process is performed. The relaxing structure includes first and second short-circuiting elements respectively connected to the first and second wiring layers and equivalent to each other. The first and second short-circuiting elements are configured to short-circuit the first and second gate electrodes with the first and second channel regions, respectively.

Abstract: An electronic equipment system includes an electronic device, a loading device for loading into and unloading from the electronic device, a light emitting section in the electronic device corresponding to the loading device, and an optical fiber corresponding to the loading device. The optical fiber transmits light from the light emitting section from a first end to a second end of the optical fiber.

Abstract: An offset cancellation circuit of this invention includes operational amplifiers 11, 12 having fully differential outputs and common mode output, and comprises an adder 15 supplied with one Vo.sup.+ 1 of the fully-differential outputs of the operational amplifier 11 and one Vo.sup.+ 2 of the fully-differential outputs of the operational amplifier 12 to add them to output added result, an adder 16 supplied with the other Vo.sup.- 1 of the fully-differential outputs of the operational amplifier 11 and the other Vo.sup.- 2 of the fully-differential outputs of the operational amplifier 12 to add them to output added result, an adder 13 supplied with common mode output Vcm1 of the operational amplifier 11 and common mode output Vcm2 of the operational amplifier 12 to add them to output added result, and a multiplier 14 for multiplying an output of the adder 13 by 1/2 to output it.

Abstract: A power source device including, a primary reference voltage generating device having a positive power source terminal connected to receive one of ground potential and a DC positive voltage and a negative power source terminal connected to receive a primary DC negative voltage for generating a primary reference voltage, a reference voltage generating device having a positive power source terminal connected to receive the DC positive voltage and a negative power source terminal connected to receive the primary reference voltage for generating a reference voltage, a positive voltage generating device for obtaining a difference between the reference voltage and the primary reference voltage and amplifying the difference to generate the DC positive voltage, a negative voltage generating device for inverting amplifying the DC positive voltage to generate a negative DC voltage, and an integrated circuit having a positive power source terminal connected to receive the DC positive voltage and a negative power source

Abstract: An image forming apparatus includes an image bearing member, image forming station for forming a latent image on the image bearing member, a conveying passage extending toward the image bearing member to guide a developing device, a first moving mechanism for engaging with the developing device in the conveying passage and moving it in a substantially horizontal plane, wherein the image bearing member, the latent image forming station, the conveying passage and the first moving mechanism are provided in a main body of the image forming apparatus, a device for accommodating a plurality of developing devices.

Abstract: An image forming apparatus includes a main assembly having a developing position, an opening for receiving and delivering developing devices and developing device transportation passage for communicating the developing position and the opening; a developing device accommodating device for accommodating a plurality of the developing devices and for supplying them to the opening; a detecting device for detecting a malfunction of an image forming operation; and a device for transporting the developing device to either the main assembly or the developing device accommodating device in response to detection by the detecting device.

Abstract: An image forming apparatus capable of effecting plural image forming operations on one transfer sheet includes an image transfer device for transferring an image on the transfer sheet, an image magnification changing mechanism for changing the magnification of the image to be transferred onto the transfer sheet, and a control device for controlling the magnification changing mechanism in accordance with deformation of the transfer sheet caused by an image forming operation on the transfer sheet, after a first image is formed on the transfer sheet and before a second image is formed on the same transfer sheet, whereby those images are correctly registered.