摘要:
Logic circuitry (1) includes a resonant-tunneling transistor ( 1) and a resistor (13) connected in series thereto. The resonant-tunneling transistor has a superlattice structure and may be a resonant-tunneling hot electron transistor or a resonant-tunneling bipolar transistor. The resonant-tunneling transistor is operable to flow a current, between a collector and an emitter, having one of at least three different current values of a first, a second or a third value in response to a base voltage (V IN ) in one of three different voltage values of a first, second or a third value. The third current value lies between the first and second current values, and the second voltage value lies between the first and third voltage values. The logic circuitry outputs one of at least three states having a high value, a low value, and a value approximately in between the high and low values in response to a signal applied to the logic circuitry the signal having an amplitude of one of the first to third voltage values.
摘要:
A semiconductor memory device including a semiconductor substrate (1) comprising a field oxide layer (10) selectively formed on the semiconductor substrate, a capacitor including a insulating layer (7) formed on the surface of a trench (6) formed in such a manner that at least an edge portion of the field oxide layer is removed, a conductive layer (8) formed on the insulating layer (7), a dielectric layer (9) formed on the conductive layer (8) and an electrode (11) formed on the dielectric layer (9).
摘要:
The soft-error rate in an MOS d-RAM semiconductor memory device can be reduced by an impurity-doped getter region (14) of conductivity opposite to that of a substrate 11, formed in the substrate 11 below and in contact with a field oxide layer 12 on the substrate 11. This getter region 14 collects minority carriers produced by incident radiation and so shields the memory cell capacitor from these minority carriers as well as by forming a capacitor storage on the field oxide layer 12. This device has an advantage of not decreasing the density of a memory cell array.
摘要:
The soft-error rate in an MOS d-RAM semiconductor memory device can be reduced by an impurity-doped getter region (14) of conductivity opposite to that of a substrate 11, formed in the substrate 11 below and in contact with a field oxide layer 12 on the substrate 11. This getter region 14 collects minority carriers produced by incident radiation and so shields the memory cell capacitor from these minority carriers as well as by forming a capacitor storage on the field oxide layer 12. This device has an advantage of not decreasing the density of a memory cell array.
摘要:
A semiconductor memory device comprising: a memory cell array block (150) including a plurality of sub memory cell array blocks (162); a sense amplifier column associated with said memory cell array block, the sense amplifier column including a plurality of sense amplifier blocks (164), each associated with corresponding sub memory cell array block; a column decoder receiving a column address to output a column block select signal; and a sense amplifier driving signal generating circuit for driving specified sense amplifier block among the plurality of sense amplifier blocks (164) in response to said column block select signal.
摘要:
A semiconductor device for generating first and second internal clocks complementary with each other from an external clock and usable for both a system of a type using a complementary clock and a system of a type generating a 180° phase clock internally, is disclosed. A first clock input circuit (buffer) (11) is supplied with a first eternal clock (CLK) and outputs a first internal clock (CLK1). A second clock input circuit (buffer) (12) is supplied with a second external clock (/CLK) complementary with the first external clock and outputs a second clock. A 1/2 phase clock generating circuit (22) generates a 1/2 phase shift signal 180° out of phase with the first internal clock (CLK). A second external clock state detection circuit judges whether the second external clock (/CLK) is input to the second clock input buffer. A switch (23) is operated to produce the second clock as the second internal clock when the second external clock is input and to produce the 1/2 phase shift signal as the second internal clock when the second external clock is not input, in accordance with the judgement at the second external clock state detection circuit.
摘要:
A semiconductor device for generating first and second internal clocks complementary with each other from an external clock and usable for both a system of a type using a complementary clock and a system of a type generating a 180° phase clock internally, is disclosed. A first clock input circuit (buffer) (11) is supplied with a first eternal clock (CLK) and outputs a first internal clock (CLK1). A second clock input circuit (buffer) (12) is supplied with a second external clock (/CLK) complementary with the first external clock and outputs a second clock. A 1/2 phase clock generating circuit (22) generates a 1/2 phase shift signal 180° out of phase with the first internal clock (CLK). A second external clock state detection circuit judges whether the second external clock (/CLK) is input to the second clock input buffer. A switch (23) is operated to produce the second clock as the second internal clock when the second external clock is input and to produce the 1/2 phase shift signal as the second internal clock when the second external clock is not input, in accordance with the judgement at the second external clock state detection circuit.