摘要:
It is intended to provide a semiconductor integrated circuit device and adjustment method of the same semiconductor integrated circuit device, capable of adjusting an analog signal outputted from an incorporated analog signal generating section without outputting it outside as an analog value. An analog signal AOUT is outputted from an analog signal generating section 3 in which an adjustment signal AD is inputted. The analog signal AOUT is inputted to a judgment section 1, in which it is compared and judged with a predetermined value and then a judgment signal JG is outputted. The judgment signal JG acts on a predetermined signal storing section 4 as an internal signal and the adjustment signal AD is fetched into the predetermined signal storing section 4. Further, the judgment signal JG is outputted as digital signal through an external terminal T2 and an external tester device acquires the adjustment signal and stores the acquired adjustment signal in the predetermined signal storing section 4. Consequently, the analog signal can be adjusted as analog value without being outputted outside and an adjustment test can be carried out with a simple tester device and according to a simple test method accurately and rapidly.
摘要:
A semiconductor device includes both a logic circuit and a macro circuit. The macro circuit includes a circuit that consumes direct current (DC). In order to conserve power and allow for testing, the consumption of DC by the current consumption circuit can be stopped with a stop signal, which stops the operation of the macro circuit. The macro circuit can be restarted or returned to normal operation mode without risk of error caused by the stopping of the macro circuit.
摘要:
A semiconductor memory device, such as a SDRAM, includes input/output data line pairs, data bus line pairs, and a redundancy data bus line pair. The input/output data line pairs are connected to a corresponding one of the data bus line pairs and an adjacent one of the data bus line pairs via redundancy shift switches, with a last one of the input/output data line pairs being connected to a last one fo the data bus line pairs and the redundancy data bus line pair. Sense buffers and write amplifiers are connected between each of the data bus line pairs and the redundancy data line pair. The shift switches are located closer to the input/output data line pairs than the sense buffers and the write amplifiers so that data read from the memory cells is less effected by the on resistance and the parasitic capacitance of the switches. When the switches are located closer to the data bus lines than the sense buffers and the write amplifiers are, the switches effect the data signals of data read from the memory cells.
摘要:
A flash-erasable semiconductor memory device has a memory cell array including a plurality of memory cell transistors each having an insulated floating gate for storing information and a control electrode provided on the floating gate, wherein the flash-erasable semiconductor memory device includes a write control circuit supplied with a write control signal, when writing information. The write control circuit produces a control signal such that a leading edge of the drain control signal appears after a leading edge of the gate control signal. Further, the gate control circuit shuts off the gate control signal such that a trailing edge of the gate control signal appears after a trailing edge of the drain control signal.
摘要:
A negative-voltage circuit for realizing a flash memory is installed independently and is applied selectively to word lines in response to signals sent from row decoders. Row decoders for specifying word lines need not be installed in the negative voltage circuit. The negative circuit can therefore be reduced in scale.
摘要:
A semiconductor memory has a plurality of word lines, a plurality of bit lines, a plurality of memory cells, a differential sense amplifier, and load transistors. Each of the memory cells is a MIS transistor formed at each intersection of the word and bit lines. The threshold voltage of the MIS transistor is externally electrically controllable. The differential sense amplifier senses data stored in a selected memory cell located at an intersection of selected word and bit lines. A control pulse signal is applied to the gates of the load transistors, to bias the bit lines. The pulse width of the control pulse signal is a minimum essential to read data out of the selected memory cell. The control pulse signal controls the switching of the load transistors, to shorten a period during which a stress voltage is continuously applied to the drains of unselected memory cells that are connected to the bit line to which the selected memory cell is connected.
摘要:
A leak current detection circuit that improves the accuracy for detecting a leak current in a MOS transistor without enlarging the circuit scale. The leak current detection circuit includes at least one P-channel MOS transistor which is coupled to a high potential power supply and which is normally inactivated and generates a first leak current, at least one N-channel MOS transistor which is coupled between a low potential power and at least the one P-channel MOS transistor and which is normally inactivated and generates a second leak current, and a detector which detects a potential generated at a node between the at least one P-channel MOS transistor and the at least one N-channel MOS transistor in accordance with the first and second leak currents.
摘要:
A body-bias voltage controller includes: a plurality of transistors at least one of which is supplied with a body-bias voltage; a monitor circuit to detect voltage characteristics of the plurality of transistors and to output a indicator signal; and a body-bias voltage generator to generate the body-bias voltage based upon the indicator signal.
摘要:
The present invention provides a synchronous semiconductor device suitable for improving the efficiency of application of electrical stresses to the device, an inspection system and an inspection method thereof in order to efficiently carry out a burn-in stress test. A command latch circuit having an access command input will output a low-level pulse in synchronism with an external clock. The pulse will pass through a NAND gate of test mode sequence circuit and a common NAND gate to output a low-level internal precharge signal, which will resent a word line activating signal from the control circuit. Simultaneously, an internal precharge signal passing through the NAND gate will be delayed by an internal timer a predetermined period of time to output through the NAND gate a low-level internal active signal, which will set a word line activating signal from the control circuit.
摘要:
The present invention provides a synchronous semiconductor device suitable for improving the efficiency of application of electrical stresses to the device, an inspection system and an inspection method thereof in order to efficiently carrying out a burn-in stress test. A command latch circuit having an access command input will output a low-level pulse in synchronism with an external clock. The pulse will pass through a NAND gate of test mode sequence circuit and a common NAND gate to output a low-level internal precharge signal, which will reset a word line activating signal from the control circuit. Simultaneously, an internal precharge signal passing through the NAND gate will be delayed by an internal timer a predetermined period of time to output through the NAND gate a low-level internal active signal, which will set a word line activating signal from the control circuit.