摘要:
A technique capable of promoting miniaturization of an RF power module used in a mobile phone etc. is provided. A directional coupler is formed inside a semiconductor chip in which an amplification part of the RF power module is formed. A sub-line of the directional coupler is formed in the same layer as a drain wire coupled to the drain region of an LDMOSFET, which will serve as the amplification part of the semiconductor chip. Due to this, the predetermined drain wire is used as a main line and the directional coupler is configured by a sub-line arranged in parallel to the main line via an insulating film, together with the main line.
摘要:
A technique capable of promoting miniaturization of an RF power module used in a mobile phone etc. is provided. A directional coupler is formed inside a semiconductor chip in which an amplification part of the RF power module is formed. A sub-line of the directional coupler is formed in the same layer as a drain wire coupled to the drain region of an LDMOSFET, which will serve as the amplification part of the semiconductor chip. Due to this, the predetermined drain wire is used as a main line and the directional coupler is configured by a sub-line arranged in parallel to the main line via an insulating film, together with the main line.
摘要:
Certain embodiments provide an ADC includes a comparator, a binary counter and a control circuit. The comparator compares a first analog signal voltage with a first reference voltage, and compares a second analog signal voltage with a second reference voltage. The binary counter counts up the clock signal for a first period until the first reference voltage becomes equal to the first analog signal after the comparator starts to compare the first reference voltage with the first analog signal voltage, and inverts a logic level of the count output having a plurality of bits after the first period elapses. The binary counter counts up the clock signal for a second period until the second reference voltage becomes equal to a second analog signal after the comparator starts to compare the second reference voltage with the second analog signal voltage.
摘要:
According to one embodiment, a solid state imaging device includes a pixel cell including an FD node to convert a charge stored in a photodiode into a signal voltage and an amplifier transistor in which a gate is connected to the FD node, a source is connected to an output signal line, and a drain is connected to a pixel-power node, a voltage control portion including a first control transistor in which a gate sets to a first bias voltage, a source is connected to the output signal line, and a drain is connected to a first control portion-power node, a load circuit including a current source connected directly between one end of the output signal line and a source power supply node, and a control circuit which controls an operation to decide a reset voltage of the output signal line. The control circuit boosts the FD node.
摘要:
A clamp circuit includes a clamp circuit which limits an output of a source follower circuit, includes a first Nch transistor, a first constant current source connected between ground and the output terminal, a second Nch transistor having a gate that receives a bias voltage and a source connected to the output terminal of the source follower circuit, a second constant current source connected between the power supply and a drain of the second Nch transistor, and a first Pch transistor having a gate connected to the drain of the second Nch transistor, a source connected to the power supply, and a drain connected to the output terminal of the source follower circuit.
摘要:
A reduction is achieved in the primary-side input impedance of a transformer (voltage transformer) as an output matching circuit without involving a reduction in Q-factor. An RF power amplifier includes transistors, and a transformer as the output matching circuit. The transformer has a primary coil and a secondary coil which are magnetically coupled to each other. To the input terminals of the transistors, respective input signals are supplied. The primary coil is coupled to each of the output terminals of the transistors. From the secondary coil, an output signal is generated. The primary coil includes a first coil and a second coil which are coupled in parallel between the respective output terminals of the transistors, and each magnetically coupled to the secondary coil. By the parallel coupling of the first and second coils of the primary coil, the input impedance of the primary coil is reduced.
摘要:
There is a need to provide a high-frequency power amplifier capable of reducing a talk current and reducing a phase deviation in output. The high-frequency power amplifier includes differently sized first through fifth power amplification transistors and impedance matching circuits for example. The high-frequency power amplifier changes a signal path to be used in accordance with a power specification signal. The high-frequency power amplifier uses a signal path from the first transistor to the second transistor in high power mode. The high-frequency power amplifier uses a signal path from the first transistor to the third transistor in medium power mode. The high-frequency power amplifier uses a signal path from the fourth transistor to the fifth transistor in low power mode. The high-frequency power amplifier is configured so that each of the signal paths includes the same number of stages of power amplification transistors and impedance matching circuits.
摘要:
An analog-to-digital converter receives first and second analog signal voltages, and first and second comparison voltages. The first and second comparison voltages decrease by the same fixed inclination from a first reference voltage to below the first signal voltage and from a second reference voltage to below the second signal voltage, respectively. The converter counts cumulatively over first periods to acquire a first result, counts cumulatively over second periods to acquire a second result, and outputs a difference between the first and second results as a digital quantity. Each first period is time required for the first comparison voltage to change from the first reference voltage to the same voltage as the first signal voltage. Each second period is time required for the second comparison voltage to change from the second reference voltage to the same voltage as the second signal voltage.
摘要:
An input device having a given input screen includes a first unit that generates data indicating any one of a touch position, a touch area, and a touching time, the touch position being a position touched by an object, the touch area being an area touched by the object, and the touching time being a period touched by the object, a second unit that generates password codes based on any one of the touch position, the touch area, and the touching time, and a third unit that judges whether a user is an authorized user based on the password code. It is possible to generate password codes including data of any one of the touch position, the touch area, and the touching time. Accordingly, the password cannot be stolen by others, and the input device with which impersonation or spoofing is difficult and the password need not be input.