Abstract: A tubular fuser device rotates and is in contact with a sheet on which a positively charged toner image is formed to fix the toner image to the sheet. The fuser device includes a tubular substrate made of a metal, a rubber layer covering the outer periphery of the substrate, an adhesion layer covering the outer periphery of the rubber layer, and a surface layer made of a resin covering the outer periphery of the adhesion layer. The adhesion layer has a first adhesion layer that is in contact with the rubber layer and a second adhesion layer interposed between the first adhesion layer and the surface layer. The first adhesion layer is made of a fluororesin-based adhesive, and the second adhesion layer is made of a silicone rubber-based adhesive containing an ionic conductor.

Abstract: A connector housing includes a cylindrical side wall. The cylindrical side wall includes a concave surface on one side of an outer circumferential surface of the cylindrical side wall in a first direction. The concave surface curves inwards into an arc shape and extends in a second direction, so that the concave surface is to be pressed against a cylindrical member with the second direction aligned with a direction in which the cylindrical member extends.

Abstract: A connector housing includes a cylindrical side wall. The cylindrical side wall includes a concave surface on one side of an outer circumferential surface of the cylindrical side wall in a first direction. The concave surface curves inwards into an arc shape and extends in a second direction, so that the concave surface is to be pressed against a cylindrical member with the second direction aligned with a direction in which the cylindrical member extends.

Abstract: At image formation time, when the light amount setting value used in the image formation is equal to or larger than the light amount value Xm affected by the stray light, a corrected signal width Tw corresponding to the light amount setting value used in the image formation is calculated from the increase ratio ?n of the signal width tn of a detection signal acquired in a region having a light amount value smaller than the light amount value Xm affected by the stray light; and a synchronization signal is generated on the basis of a center position of the corrected signal width Tw.

Abstract: At image formation time, when the light amount setting value used in the image formation is equal to or larger than the light amount value Xm affected by the stray light, a corrected signal width Tw corresponding to the light amount setting value used in the image formation is calculated from the increase ratio ?n of the signal width tn of a detection signal acquired in a region having a light amount value smaller than the light amount value Xm affected by the stray light; and a synchronization signal is generated on the basis of a center position of the corrected signal width Tw.

Abstract: At image formation time, when the light amount setting value used in the image formation is equal to or larger than the light amount value Xm affected by the stray light, a corrected signal width Tw corresponding to the light amount setting value used in the image formation is calculated from the increase ratio ?n of the signal width tn of a detection signal acquired in a region having a light amount value smaller than the light amount value Xm affected by the stray light; and a synchronization signal is generated on the basis of a center position of the corrected signal width Tw.

Abstract: A switching power supply apparatus includes a voltage holding unit which holds voltage generated in an auxiliary winding of a transformer, and a voltage detecting unit which detects voltage applied to the first switching unit. When the first switching unit operates such that voltage generated in a secondary winding of the transformer may be low, voltage is supplied from the voltage holding unit to the first switching unit in accordance with the voltage detected by the voltage detecting unit to thus turn on the first switching unit.

Abstract: At image formation time, when the light amount setting value used in the image formation is equal to or larger than the light amount value Xm affected by the stray light, a corrected signal width Tw corresponding to the light amount setting value used in the image formation is calculated from the increase ratio ?n of the signal width to of a detection signal acquired in a region having a light amount value smaller than the light amount value Xm affected by the stray light; and a synchronization signal is generated on the basis of a center position of the corrected signal width Tw.

Abstract: A high-voltage power supply device includes: a piezoelectric transformer; a driving unit of the piezoelectric transformer; a detection unit configured to detect an output of the piezoelectric transformer; and a control unit configured to control the output of the piezoelectric transformer by giving a driving signal to the driving unit so that the output detected by the detection unit reaches a target value, wherein the control unit changes a frequency of the driving signal without changing a duty of the driving signal so as to set the frequency of the driving signal such that the output detected by the detection unit falls within a predetermined range including the target value, and after setting the frequency for the driving signal such that the output detected by the detection unit falls within the predetermined range, changes the duty of the driving signal so that the output detected by the detection unit reaches the target value.

Abstract: A power supply apparatus including a current regulation unit configured to regulate a surge current generated on a primary side of a piezoelectric transformer. The surge current is generated when the piezoelectric transformer including a piezoelectric element and a holding unit, which are connected to each other using a conductive rubber, is driven.

Abstract: Provided is a temperature compensated oscillator includes an oscillation circuit for oscillating an oscillator. In the oscillator, when an oscillation frequency is changed by a second control signal after being controlled by a first control signal, variation in the oscillation frequency due to a second control signal is set to a fixed amount. The oscillation frequency of the oscillator is controlled on the basis of both the first control signal and the second control signal, but an oscillation amplitude adjusting section is also added, the oscillation amplitude adjusting section allowing the oscillation amplitude of the oscillator to be changed by the second control signal. The oscillator thus allows a fixed amount of oscillation frequency control over a wide range (full range) of oscillation frequency control due to the first control signal.

Abstract: A converter includes a switching unit configured to switch a voltage to be input, an inductor connected to the switching unit, a conversion unit configured to convert the voltage switched by the switching unit to be supplied to the inductor into a direct current voltage, a detection unit configured to detect the direct current voltage converted by the conversion unit, and a correction unit configured to correct the detected voltage detected by the detection unit, wherein an operation of the switching unit is controlled based on the voltage corrected by the correction unit.

Abstract: A switching power supply apparatus includes a voltage holding unit which holds voltage generated in an auxiliary winding of a transformer, and a voltage detecting unit which detects voltage applied to the first switching unit. When the first switching unit operates such that voltage generated in a secondary winding of the transformer may be low, voltage is supplied from the voltage holding unit to the first switching unit in accordance with the voltage detected by the voltage detecting unit to thus turn on the first switching unit.

Abstract: Provided is a temperature compensated oscillator includes an oscillation circuit for oscillating an oscillator. In the oscillator, when an oscillation frequency is changed by a second control signal after being controlled by a first control signal, variation in the oscillation frequency due to a second control signal is set to a fixed amount. The oscillation frequency of the oscillator is controlled on the basis of both the first control signal and the second control signal, but an oscillation amplitude adjusting section is also added, the oscillation amplitude adjusting section allowing the oscillation amplitude of the oscillator to be changed by the second control signal. The oscillator thus allows a fixed amount of oscillation frequency control over a wide range (full range) of oscillation frequency control due to the first control signal.

Abstract: A high-voltage power supply device comprises: a piezoelectric transformer; a driving unit of the piezoelectric transformer; a detection unit configured to detect the output of the piezoelectric transformer; and a control unit configured to control the output of the piezoelectric transformer by giving a driving signal to the driving unit so that the output detected by the detection unit reaches a target value, wherein the control unit changes a frequency of the driving signal without changing a duty of the driving signal so as to set the frequency of the driving signal such that the output falls within a predetermined range including the target value, and after setting the frequency for the output within the predetermined range, changes the duty of the driving signal so that the output reaches the target value.

Abstract: A power supply apparatus including a current regulation unit configured to regulate a surge current generated on a primary side of a piezoelectric transformer. The surge current is generated when the piezoelectric transformer including a piezoelectric element and a holding unit, which are connected to each other using a conductive rubber, is driven.

Abstract: A circuit for generating a component of n-th order includes: six differential amplifiers (15A to 15F) having a pair of input terminals supplied with a common linear input signal and a constant level signal of a predetermined level, outputting a reversed or non-reversed signal to the linear input signal, and having a limiter function to limit the output signal to a predetermined maximum value and a minimum value; a constant level signal generation circuit for supplying the constant level signal to each of the six differential amplifiers; a current mirror circuit (14) for controlling current flowing in the differential amplifiers (15A to 15F); and addition resistors (16A, 16B) for adding the output current of the differential amplifiers (15A to 15F).

Abstract: A circuit for generating a component of n-th order includes: six differential amplifiers (15A to 15F) having a pair of input terminals supplied with a common linear input signal and a constant level signal of a predetermined level, outputting a reversed or non-reversed signal to the linear input signal, and having a limiter function to limit the output signal to a predetermined maximum value and a minimum value; a constant level signal generation circuit for supplying the constant level signal to each of the six differential amplifiers; a current mirror circuit (14) for controlling current flowing in the differential amplifiers (15A to 15F); and addition resistors (16A, 16B) for adding the output current of the differential amplifiers (15A to 15F).

Abstract: A constant voltage generating circuit which uses a band gap reference circuit to produce a constant voltage and which is effective at reducing driving voltage and noise. The voltage generating circuit has a plurality of first bipolar transistors including n first bipolar transistors, each having an emitter area. The voltage generating circuit also includes a plurality of second bipolar transistors including n second bipolar transistors. Each of the n second bipolar transistors has an associated emitter area greater than the emitter area of each of the plurality of the first bipolar transistors. The constant voltage generating circuit produces a constant output voltage that is independent of temperature and the number of first and second transistors.

Abstract: Radio communication system and method capable of expanding the coverage of a radio base station and thereby permitting efficient radio communications. A continuous time slot allocating unit continuously allocates time slots in a frame to generate a continuous time slot. During the period of the continuous time slot, a propagation information calculating unit communicates with a terminal unit to calculate propagation information about radio wave propagation between the radio base station and the terminal unit. Also, during the period of the continuous time slot, a transmission timing calculating unit calculates, based on the propagation information, transmission timing for a signal to be transmitted from the terminal unit to the radio base station. Signal transmitting unit transmits the signal in accordance with the transmission timing.