摘要:
A semiconductor sensing device generates an output based on a sensor. A connection point of an output circuit constituted by first and second switching output elements connected so as to be complementary is connected to an output terminal. Between the first switching output element and the connection point of the output circuit, a first switching element is connected. Between the second switching output element and the connection point of the output circuit, a second switching element is connected. When voltage of the output terminal is a voltage lower than a lower limit clamp voltage, the first switching element turns OFF. When the voltage of the output terminal is a voltage higher than an upper limit clamp voltage, the second switching element turns OFF.
摘要:
In aspects of the invention, an auxiliary memory circuit includes a shift register wherein a plurality of flip-flops are cascade-connected and a plurality of inversion circuits that invert and output outputs of each D flip-flop. A main memory circuit includes a switch, which acts in accordance with a signal from the auxiliary memory circuit, and an EPROM connected in series to the switch and driven by a writing voltage. A variable resistance circuit includes a switch, which acts in accordance with a signal from the auxiliary memory circuit, and a resistor connected in series to the switch. With aspects of the invention, it is possible for terminals of the writing voltage and a writing voltage to be commonized. Also, it is possible to provide a low-cost semiconductor physical quantity sensor device that can carry out electrical trimming with the voltage when writing into the EPROM kept constant.
摘要:
It is desired to further reduce output errors which are caused by temperature characteristics. A sensor device is provided which includes a sense circuit which outputs a sense signal according to a magnitude of a detected physical quantity, an amplifier circuit which amplifies the sense signal, and a switching unit which switches at least one of a sensitivity of the sense circuit and an offset of the amplifier circuit discontinuously according to whether a temperature measurement value exceeds a threshold value.
摘要:
On an IC chip, a first ground wiring line and a second ground wiring line that extends from a connection site with the first ground wiring line are disposed in a doubled manner. Among EPROMs storing identical data, the source of a first EPROM is connected to the second ground wiring line and the source of a second EPROM is connected to the first ground wiring line. The drains of the EPROMs are electrically connected to a write voltage line. An OR circuit outputs as 1-bit data of the memory circuit, the logical sum of the data stored by at least two of the EPROMs storing identical data. The EPROMs and the OR circuit are disposed near each other on the IC chip.
摘要:
Provided is a pressure detection device including: a semiconductor substrate having an upper surface; a bulk region of a first conductivity type provided in the semiconductor substrate; a piezo-resistive region of the first conductivity type provided between the bulk region and the upper surface of the semiconductor substrate; a first well region of a second conductivity type provided between the piezo-resistive region and the bulk region; and a first low-concentration region of the second conductivity type provided between the first well region and the bulk region and having a lower concentration than the first well region.
摘要:
A pressure sensor for detecting pressure is provided. A pressure sensor including: a sensor portion that is provided in a diaphragm in a substrate; a circuit portion that is provided on the substrate and electrically connected to the sensor portion; a pad of conductivity that is provided above the substrate; and a first protective film that is provided on the pad, wherein the first protective film is also provided above the circuit portion, is provided. The first protective film may cover the circuit portion entirely. The first protective film may not cover at least part of the sensor portion. The first protective film may cover part of the sensor portion.
摘要:
A protection circuit includes a first PMOS and a first PDMOS receiving input of voltage of a voltage dividing point of voltage input from an external power supply terminal, and a second PMOS and a second PDMOS receiving input of drain output voltage of the first PDMOS. The first PMOS is connected on the external power supply terminal side of the first PDMOS, and the second PMOS is connected on the external power supply terminal side of the second PDMOS. During overvoltage application, the voltage of the voltage dividing point is clamped to the breakdown voltage of a Zener diode, the second PDMOS turns OFF, and supply to an integrated circuit protected from overvoltage is cut off. When the voltage source is connected in reverse, parasitic diodes of the first and second PMOSs are reverse-biased and the flow of current in a path through the parasitic diodes is inhibited.
摘要:
Aspects of a semiconductor pressure sensor device can include a semiconductor substrate having a depressed portion which forms a vacuum reference chamber, a diaphragm disposed on the front surface of the semiconductor substrate, and strain gauge resistors. The device can further include an aluminium wiring layer disposed on the semiconductor substrate, an antireflection film which is a TiN film disposed on the aluminium wiring layer, an adhesion securing and diffusion preventing layer which is a film stack of a Cr film and Pt film disposed on the TiN film, and an Au film stacked on the adhesion securing and diffusion preventing layer.
摘要:
Provided is a semiconductor circuit connected to a load circuit and configured to control power supply to the load circuit, comprising: a power line to which a power voltage is applied; an overvoltage protection unit that has an output unit configured to interrupt power supply from the power line to the load circuit when the power voltage in the power line is overvoltage; and a state notification unit configured to notify the outside of a state signal indicating whether the output unit is interrupting the power supply.
摘要:
A semiconductor physical quantity sensor device having a power source terminal for receiving a power source potential, a ground terminal for receiving a ground potential, and an output terminal. The semiconductor physical quantity sensor includes a sensor configured to generate a signal, an amplifier configured to amplify the signal, and to output the amplified signal through the output terminal, a first resistor electrically connected between the power source terminal and the amplifier, a second resistor electrically connected between the output terminal and the ground terminal, and a filter electrically connected between the power source terminal and the sensor, and including a third resistor and a capacitor.