Abstract: Provided is a liquid processing apparatus that selectively supplies processing liquids with a switching operation to the surface of a substrate to perform a liquid processing. The liquid processing apparatus includes a first processing liquid supply unit including a first nozzle block that selectively supplies an acidic chemical liquid and a rinse liquid, and a second processing liquid supply unit including a second nozzle block that selectively supplies an alkaline chemical liquid and a rinse liquid. When a chemical liquid is supplied to the substrate from one of the first and second nozzle blocks, the other of the first and second nozzle blocks is retreated to a retreat position. When the rinse liquid is supplied to the substrate from one of the first and second nozzle blocks, the other of the first and second nozzle blocks is moved to a processing position.

Abstract: Provided is a liquid processing apparatus that selectively supplies processing liquids with a switching operation to the surface of a substrate to perform a liquid processing. The liquid processing apparatus includes a first processing liquid supply unit including a first nozzle block that selectively supplies an acidic chemical liquid and a rinse liquid, and a second processing liquid supply unit including a second nozzle block that selectively supplies an alkaline chemical liquid and a rinse liquid. When a chemical liquid is supplied to the substrate from one of the first and second nozzle blocks, the other of the first and second nozzle blocks is retreated to a retreat position. When the rinse liquid is supplied to the substrate from one of the first and second nozzle blocks, the other of the first and second nozzle blocks is moved to a processing position.

Abstract: A drive signal that matches the bias of a transistor is generated. A differential amplifier calculates the difference between a specified voltage of negative power supply and another input signal. Then, a resistor that realizes a pull-down function level-shifts it towards a negative power supply voltage having a higher absolute voltage value to generate another differential signal, which is in turn amplified in another amplifier, to generate another drive signal that matches the bias of another transistor. Respective current mirror circuits detect a falling voltage occurring at both ends of a resistor connected between the transistor and the higher positive power supply voltage and a falling voltage occurring at both ends of a resistor connected between the other transistor and the higher negative power supply voltage, respectively. Then, the presence of an excessive electric current is detected by generating electric currents in accordance with to the falling voltages.

Abstract: The electric power supply unit is provided with: a DC-DC converter in which a electric current is supplied through a backup line; the other DC-DC converter in which a electric current is supplied through an accessory line; and a voltage controlling circuit. The voltage controlling circuit controls the DC-DC converters so as to keep their output voltage at the same value.

Abstract: A drive signal that matches the bias of a transistor is generated. A differential amplifier calculates the difference between a specified voltage of negative power supply and another input signal. Then, a resistor that realizes a pull-down function level-shifts it towards a negative power supply voltage having a higher absolute voltage value to generate another differential signal, which is in turn amplified in another amplifier, to generate another drive signal that matches the bias of another transistor. Respective current mirror circuits detect a falling voltage occurring at both ends of a resistor connected between the transistor and the higher positive power supply voltage and a falling voltage occurring at both ends of a resistor connected between the other transistor and the higher negative power supply voltage, respectively. Then, the presence of an excessive electric current is detected by generating electric currents in accordance with to the falling voltages.

Abstract: The electric power supply unit is provided with: a DC-DC converter in which a electric current is supplied through a backup line; the other DC-DC converter in which a electric current is supplied through an accessory line; and a voltage controlling circuit. The voltage controlling circuit controls the DC-DC converters so as to keep their output voltage at the same value.

Abstract: A sound field forming circuit includes a first switch portion which switchingly supplies one of an audio signals from a sound source and a second tone control circuit which variably adjusts a characteristic of a second predetermined frequency band, to a first tone control circuit which variably adjusts a characteristic of a first predetermined frequency band; a second switch portion which switchingly supplies one of the audio signals from the sound source and the first tone control circuit, to the second tone control circuit; a third switch portion which switchingly supplies one of the audio signals from the first tone control circuit and the second tone control circuit, to a front channel; and a fourth switch portion which switchingly supplies one of the audio signals from the first tone control circuit and the second tone control circuit, to a rear channel.

Abstract: In an isolator circuit, a first differential pair circuit compares voltages of two input signals with each other, and, in accordance with the ratio of the voltages, currents flow through two resistors respectively connected to two output terminals of the first differential pair circuit. A current comparison circuit compares the currents respectively flowing through the two resistors, and outputs a voltage corresponding to a result of the comparison. A second differential pair circuit compares the voltage output from the current comparison circuit with a reference voltage, and a negative feedback is conducted so that the currents flowing through the two resistors are equal to each other. Unlike the conventional art, an isolator circuit can be configured without disposing buffer circuits.

Abstract: In an isolator circuit, a first differential pair circuit compares voltages of two input signals with each other, and, in accordance with the ratio of the voltages, currents flow through two resistors respectively connected to two output terminals of the first differential pair circuit. A current comparison circuit compares the currents respectively flowing through the two resistors, and outputs a voltage corresponding to a result of the comparison. A second differential pair circuit compares the voltage output from the current comparison circuit with a reference voltage, and a negative feedback is conducted so that the currents flowing through the two resistors are equal to each other. Unlike the conventional art, an isolator circuit can be configured without disposing buffer circuits.

Abstract: A sound field forming circuit includes a first switch portion which switchingly supplies one of an audio signals from a sound source and a second tone control circuit which variably adjusts a characteristic of a second predetermined frequency band, to a first tone control circuit which variably adjusts a characteristic of a first predetermined frequency band; a second switch portion which switchingly supplies one of the audio signals from the sound source and the first tone control circuit, to the second tone control circuit; a third switch portion which switchingly supplies one of the audio signals from the first tone control circuit and the second tone control circuit, to a front channel; and a fourth switch portion which switchingly supplies one of the audio signals from the first tone control circuit and the second tone control circuit, to a rear channel.