Abstract:
A headspace sample introduction device which collects a sample gas from a sample container and introduces the gas into a predetermined analyzer is provided. The device includes a sample tray 10 capable of holding at least one sample container 100 storing a liquid sample or a solid sample, a heating means 30 for heating at least one sample container 100 taken from the sample tray 10, a sample-gas collecting means 40 for collecting a sample gas from the upper space in the sample container 100 held in the heating means 30, and a cooling transfer means 20 for keeping and cooling at least one sample container 100 taken from the heating means 30 and returning the cooled sample container 100 to the sample tray 20. Since the headspace sample introduction device can return the heated sample containers 100 to the sample tray 10 after they are cooled with the cooling transfer means 20, the hot sample containers can be assuredly prevented from contacting the user.
Abstract:
In the semiconductor memory device according to the present invention, when there is a defective portion in the memory cells, those memory cells are replaced by redundant memory cells. When defective portions are discovered in the memory cells, the fuse elements corresponding to the memory cells having the defective portions are cut off. Voltages of the select lines connected to the memory cells having the defective portions are held at an L level by the resistors. Due to this, the memory cells having the defective portions are not selected.
Abstract:
A pressurization passage that divides a constant pressure from a pressure source with passage resistances so as to have a predetermined constant pressure is disposed on a downstream side of a sample loop in order to maintain a back pressure of the sample loop constant when a sample gas is collected to the sample loop.
Abstract:
A headspace sample introduction device which collects a sample gas from a sample container and introduces the gas into a predetermined analyzer is provided. The device includes a sample tray 10 capable of holding at least one sample container 100 storing a liquid sample or a solid sample, a heating means 30 for heating at least one sample container 100 taken from the sample tray 10, a sample-gas collecting means 40 for collecting a sample gas from the upper space in the sample container 100 held in the heating means 30, and a cooling transfer means 20 for keeping and cooling at least one sample container 100 taken from the heating means 30 and returning the cooled sample container 100 to the sample tray 20. Since the headspace sample introduction device can return the heated sample containers 100 to the sample tray 10 after they are cooled with the cooling transfer means 20, the hot sample containers can be assuredly prevented from contacting the user.
Abstract:
A gas sample introduction device for introducing sample gas to a gas analyzer includes a measuring tube, a sample gas supply flow path for introducing the sample gas to the measuring tube,a carrier gas supply flow path for introducing carrier gas to the measuring tube, an exhaust flow path for discharging the gas passing through the measuring tube to outside, and a collecting tube for absorbing a component in the sample gas. A first flow path switching device switches between a first state in which the measuring tube is inserted between the sample gas supply flow path and the exhaust flow path, and a second state in which the measuring tube is inserted between the carrier gas supply flow path and the gas analyzer. A second flow path switching device switches between a collecting-tube inserted state and a collecting-tube short-circuited state in which the collecting tube is not inserted.
Abstract:
A gas sample introduction device for introducing sample gas to a gas analyzer includes a measuring tube, a sample gas supply flow path for introducing the sample gas to the measuring tube,a carrier gas supply flow path for introducing carrier gas to the measuring tube, an exhaust flow path for discharging the gas passing through the measuring tube to outside, and a collecting tube for absorbing a component in the sample gas. A first flow path switching device switches between a first state in which the measuring tube is inserted between the sample gas supply flow path and the exhaust flow path, and a second state in which the measuring tube is inserted between the carrier gas supply flow path and the gas analyzer. A second flow path switching device switches between a collecting-tube inserted state and a collecting-tube short-circuited state in which the collecting tube is not inserted.
Abstract:
A pressurization passage that divides a constant pressure from a pressure source with passage resistances so as to have a predetermined constant pressure is disposed on a downstream side of a sample loop in order to maintain a back pressure of the sample loop constant when a sample gas is collected to the sample loop.
Abstract:
In an output buffer control circuit of a memory, the set/reset state of a flip-flop is controlled by an address transition detection output and a read detection output supplied when completion of data read from a memory cell is detected, and the active/inactive state of an output buffer for outputting the readout data from the memory cell is controlled by an output from the flip-flop. According to this arrangement, when an address input transits and the address transition detection output is enabled, the output buffer is inactivated. When data is read out from the memory cell and the read detection output is enabled after the address input transits, the output buffer can be activated.
Abstract:
There is disclosed a sense amplifier characterized by comprising a pull-up circuit. The pull-up circuit comprises a first transistor arranged between the first of a pair of output nodes and a pull-up power source potential node, and a second transistor arranged between the second of the pair of output nodes and the pull-up power source potential node. The gate of the first transistor is connected to the second output node and the gate of the second transistor is connected to the first output node.
Abstract:
A headspace sampler includes: a sample gas collection channel whose one end communicates with a needle; a pressure gas introduction channel and an exhaust channel that communicate with the other end of the channel in parallel via a branching pipe; a pressure control device that delivers pressure gas to the pressure gas introduction channel at a predetermined pressure; solenoid valves provided in the pressure gas introduction channel and the exhaust channel, respectively; and switching means for switching a state where a measuring pipe is inserted in the sample gas collection channel and a state where the measuring pipe is shorted away from the channel, wherein a pressure sensor is provided on an upstream side of the solenoid valve in the exhaust channel.