摘要:
A semiconductor device includes a substrate, a plurality of bump electrodes disposed on the substrate, and a support area for supporting the substrate in case of carrying the substrate. The support area is disposed on a surface of the substrate, on which the bump electrode is disposed, and is disposed at a predetermined position, which is dotted on the surface of the substrate. In this device, the support area is sufficiently small, and the number of the bump electrodes can increase. Moreover, degree of freedom in a configuration of the support area increases.
摘要:
In a voltage booster, a voltage detection circuit detects a battery voltage as an input voltage. If the input voltage is lower than a threshold level, an oscillation circuit outputs a gate signal having a relatively high frequency to increase the driving performance of a driving circuit. If the input voltage is higher than the threshold level, the frequency of the gate signal is lowered so as to prevent the driving performance of the driving circuit from rising to an excessively high value. As a result, a predetermined boosted voltage can be obtained regardless of variations in input voltage without using a filter for eliminating noise.
摘要:
A semiconductor device having a thin film resistor which comprises at least chromium, silicon and nitrogen, and formed on a substrate with having a special ratio of the chemical composition, the semiconductor device having a characteristic such that variations of the resistance value thereof due to temperature variations can be effectively suppressed.
摘要:
A temperature detecting circuit detects the rise of ambient temperature, using a forward voltage drop across a diode. The temperature detecting circuit comprises a temperature detecting diode whose cathode is grounded, a first constant current supply device connected with the anode of the temperature detecting diode, for supplying a constant current Ia to the temperature-detecting diode, a rectifying diode whose cathode is connected with the anode of the temperature detecting diode, a second constant current supply device connected with the anode of the rectifying diode, for supplying a constant current Ib to the temperature-detecting diode, a comparator, and a transistor. When the voltage at the anode of the temperature-detecting diode is lower than a reference voltage, the comparator produces a high-level signal indicative of overheating. In response to this, the transistor shorts the anode of the rectifying diode to ground potential to supply the constant current Ib from the second constant current supply device directly to ground potential.
摘要:
A driving circuit of a pulse motor for use in a vehicle odometer is provided. The driving circuit includes a pulse source for providing drive pulses, in sequence, to a plurality of phase coils of the pulse motor, and a wave-shaper for shaping leading and trailing edges of each of the drive pulses so as to vary at a given rate in plural steps for noiseless smooth rotation of the pulse motor.
摘要:
A load driving device includes: an output power device for driving a load; a driving IC for controlling the output power device, wherein the driving IC is electrically coupled with the output power device through a wire or a connection member; and a first electrode substrate. The output power device and the driving IC are mounted on the first electrode substrate. In this case, the output power device is controlled with high speed, and a mounting area of the output power device and the driving IC is reduced.
摘要:
A semiconductor device includes: n transistor elements; n resistive elements; and n capacitive elements, each kind of elements coupled in series between the first and second terminals. The gate of each transistor element has a gate pad, and each transistor element includes transistor pads disposed on both sides. Each resistive element includes resistive pads disposed on both sides. Each capacitive element includes capacitive pads disposed on both sides. The gate pad other than the first stage transistor element, a corresponding resistive pad, and a corresponding capacitive pad are electrically coupled. One transistor pad, one resistive pad, and one capacitive pad in the first stage are electrically coupled. One transistor pad, one resistive pad, and one capacitive pad in the n-th stage are electrically coupled.
摘要:
An overheat-sensing circuit includes a temperature-sensing circuit for outputting a temperature-sensing voltage, a reference voltage generation circuit for outputting a reference voltage, and a comparison circuit that compares the temperature-sensing voltage with the reference voltage and outputs an overheat-sensing signal based on a result of the comparison. The reference voltage generation circuit outputs the reference voltage in accordance with a power supply voltage when the power supply voltage is within a predetermined voltage range. In contrast, the reference voltage generation circuit generates a limited voltage based on the power supply voltage and outputs the reference voltage in accordance with the limited voltage when the power supply voltage is outside the predetermined voltage range. This approach reduces a variation in an overheat-sensing temperature at which the comparison circuit outputs the overheat-sensing signal.
摘要:
In a power supply apparatus, a switching circuit selectively applies one of an input voltage of a power converting circuit and an output voltage of the power converting circuit to a voltage reducing power supply circuit. When the input voltage is applied to the power converting circuit, the switching circuit selects this input voltage, so that the output voltage of the voltage reducing power supply circuit can quickly rise. Thereafter, when the output voltage of the power converting circuit exceeds this output voltage, the switching circuit selects the output voltage of the power converting circuit. As a result, a difference between the input voltage and the output voltage of the voltage reducing power supply circuit is decreased. Thus, a power loss is lowered and noise produced in the power converting circuit is suppressed.
摘要:
An NPN bipolar transistor and a PNP bipolar transistor are formed in a semiconductor substrate. The NPN bipolar transistor has a p type emitter region, a p type collector region and an n type base region and is formed in an NPN forming region. The PNP bipolar transistor has an n type emitter region, an n type collector region and a p type base region and is formed in a PNP forming region. Only one conductive type burying region is formed in at least one of the NPN forming region and the PNP forming region. A current that flows from the p type emitter region to the n type base region flows in the n type base region in a direction perpendicular to the substrate.