摘要:
A compact and energy efficient air conditioning system is operated with a desiccant material having a high differential adsorption capacity even at lower regeneration temperatures than those in the conventional system. The desiccant assisted air conditioning system comprises a process air path (A) for flowing process air to adsorb moisture from the process air by a desiccant member, and a regeneration air path (B) for flowing regeneration air heated by a heat source to desorb moisture from the desiccant member (103). The desiccant member is arranged so that the process air or the regeneration air flows alternatingly through the desiccant member. The desiccant member is arranged so that the process air or the regeneration air flows alternatingly through the desiccant member. The desiccant member comprises an organic polymer material, the organic polymer material comprising an amphoteric ion exchange polymer having an anion exchange group, a cation exchange group and bridging ligands, thereby exhibiting a high differential adsorption capacity.
摘要:
A semiconductor memory device has a ring oscillator that is configured so that its period in the time before reaching a raised voltage is made short and further so that its period after reaching the raised voltage is made long, and a voltage boosting circuit that raises the voltage on a word line of memory cells, based on a boosted potential that is output from the ring oscillator. The ring oscillator performs a plurality of voltage boosting operations until the boosted potential of the word line of the memory cells reaches the voltage that is required for writing of data thereinto, and makes the period of the ring oscillator output ROC short while performing the plurality of boosting operations, and makes the period of the ring oscillator output ROC long after a prescribed raised voltage level is reached, thereby reducing the amount of AC current that flows in the ring oscillator itself.
摘要:
In a static type semiconductor memory device, a word decoder is connected to a plurality of word lines to decode an address signal to select one of the plurality of word lines. A resistor load type memory cell is connected to said selected word line. The resistor load type memory cell is composed of two pairs of a load resistor and a MOS transistor and the two pairs are connected to form a flip-flop. A word line voltage boosting circuit is connected to the word decoder to boost a voltage of the selected word line to a voltage higher than a power supply voltage in response to a boost control signal. A timer circuit includes a replica of the load transistor of one of the two pair and replicas of the MOS transistors of the two pair. The timer circuit generates the boost control signal for a predetermined time period in response to a start control signal to activate said word line voltage boosting circuit.
摘要:
An output circuit is incorporated in an integrated circuit for communicating with an external device, and includes a plurality of output inverting circuits. Each such inverting circuit is implemented by a series combination of a p-channel enhancement type field effect transistor and an n-channel enhancement type field effect transistor. The inverting circuits are coupled between a positive power voltage line and a ground voltage line electrically connected with a semiconductor substrate. The output circuit also includes a plurality of output pins, each coupled between an external load and one of the output inverting circuits, and a resistive element coupled between the ground voltage line and the semiconductor substrate, so that the ground voltage line hardly fluctuates in voltage level upon concurrent switching actions of the output inverting circuits.