Seiko Epson Corporation

Haruo Hayashi

Motoaki Nishimura

Makoto Katase

Yusuke Sano

Akihiko Ito

Yoshifumi Sakamoto

A motor driving circuit includes a stepping motor driving circuit that controls driving of a stepping motor, a DC motor driving circuit that controls driving of a DC motor, and a control circuit that controls the stepping motor driving circuit and the DC motor driving circuit. The control circuit, upon accepting a driving instruction for driving the stepping motor in the middle of the DC motor driving circuit performing driving of the DC motor, stops driving of the DC motor by the DC motor driving circuit, and starts driving of the stepping motor by the stepping motor driving circuit.

Motor driving circuit, integrated circuit device, electronic apparatus, and motor control method

A circuit device includes a pulse signal output circuit and a driving circuit. The pulse signal output circuit, when a detection voltage has decreased below a reference voltage, changes a pulse signal to an active level at which a switching element is turned on. The pulse signal output circuit, after the detection voltage has decreased below the reference voltage, performs monitoring as to whether or not the detection voltage has exceeded the reference voltage, and upon detecting that the detection voltage has exceeded the reference voltage, changes the pulse signal to an inactive level at which the switching element is turned off. The driving circuit outputs a driving signal based on the pulse signal to the switching element.

Pulse width modulation circuit

A motor driving circuit includes a first motor driving circuit that controls driving of a first motor is disposed, a second motor driving circuit that controls driving of a second motor is disposed, and a constant current generation circuit that generates a constant current is disposed, and the constant current generation circuit is disposed at a position deviating from between the first motor driving circuit and the second motor driving circuit.

Motor driving circuit, integrated circuit device, and electronic apparatus

A display driver includes a drive circuit that receives input of a first reference voltage to an nth reference voltage (where n is an integer of two or more), and outputs a drive voltage that is based on a grayscale voltage obtained by voltage division of an ith reference voltage and an (i+1)th reference voltage (where i is an integer of n&#x2212;1 or less), and a control circuit that utilizes frame rate control on first display data corresponding to a grayscale voltage obtained by voltage division of the first reference voltage and a second reference voltage to generate second display data, and supplies the second display data to the drive circuit.

Display driver, electro-optic apparatus, electronic device, and control method for display driver

Provided are a control circuit for a switching regulator that can switch off a transistor that drives an inductor at high speed, an integrated circuit device, the switching regulator, an electronic device, and the like. A control circuit () includes a signal generation circuit () and an output circuit (). The signal generation circuit () generates a control signal (SG) for a switching regulator. Upon receiving the control signal (SG), the output circuit () outputs a drive signal (GD) to a gate of an N-type transistor () that drives an inductor (). The output circuit () outputs a voltage level lower than a source voltage of the N-type transistor () as an off-voltage level of the drive signal (GD) for switching off the N-type transistor ().

Growing community of inventors

Shiojiri, Japan

Haruo Hayashi