Sharp Kabushiki Kaisha Corporation

Kazuharu Date

Shigeki Imai

Tooru Yamamoto

Yoshihisa Nakatoh

Katsuhiro Masui

Hiroshi Mikami

Yuusuke Kajikawa

Fumio Murooka

An ion generation device includes: a high voltage generation circuit; and an ion generation element. The high voltage generation circuit includes: a capacitor; a high voltage transformer; a switching element; and a pulse signal generation portion which generates a pulse signal for controlling the turning on and off of the switching element. The pulse signal generation portion adjusts a pulse width of an on-period such that the pulse width of the on-period of the pulse signal is substantially equal to a time obtained by multiplying the reciprocal of an output voltage frequency at the time of a forward operation of the high voltage transformer by one-fourth.

Ion generation device and electrical apparatus

A microprocessor capable of executing a micro-instruction output from a micro-memory according to an address which corresponds to an instruction to be executed at a time when each time the microprocessor receives the address is provided. The microprocessor includes a unit (a T1 cycle signal generator, a T2 cycle signal generator, a TW cycle signal generator) for generating a control signal for a period of time corresponding to a period of time of a waiting signal at a time when the waiting signal is received from the outside, and a unit (a microcode read-only memory, a read-only memory address latch, a read-only memory output latch, an address control circuit, a multiplexer) connected to the control signal generating unit (the T1 cycle signal generator, the T2 cycle signal generator, the TW cycle signal generator) for holding an address supplied to the micro-memory for a period of time corresponding to a period of time of the control signal.

Microprocessor having waiting function

A circuit for generating a pulse-like timing signal driving a stepping motor which is used to drive for example a magnetic tape to run in an audio tape or video tape recording and reproducing apparatus. A rewritable memory stores output pattern data and time information for generating the timing signal. This timing signal generating circuit comprises a rewrite control circuit responsive to an operation mode instructing signal, for performing a predetermined operational processing on basic pattern data and basic time information and storing the resulting output pattern data and uniquely related time information in the rewritable memory. This timing signal generating circuit further comprises a circuit for generating a clock signal having a predetermined cycle, a counter for counting this clock signal and a circuit for sequentially reading out the time information from the rewritable memory, detecting match between the read-out time information and count value of the counter, and outputting the output data stored in the rewritable memory corresponding to the time information for which match is detected, as the timing signal. This output circuit comprises a circuit for continuously outputting the present output data until another match is detected between the subsequently read-out time information and the count value of the counter.

Apparatus for and method of generating a timing signal

An amplifier circuit having a differential amplifier, provided in a semiconductor integrated circuit is disclosed. The differential amplifier has one input connected to a reference voltage generating circuit. The voltage outputted from the reference voltage generating circuit includes a voltage fluctuation depending on the fluctuation in power-supply voltage Vcc. However, a fluctuation absorbing circuit comprising resistors 51 and 52, diodes 53 and 54, and a capacitor 55 absorbs the voltage fluctuation thereof. As a result, the change in offset voltage of the differential amplifier is prevented, resulting in an improvement of a power-supply rejection ratio.

Growing community of inventors

Tenri, Japan

Kazuharu Date