摘要:
A single-ended SRAM including at least one memory cell and a third switch is provided. The memory cell includes a data-latching unit, a first switch, a second switch and a data-transferring unit. The data-latching unit is configured for latching the received input data and provides a storage data and the inverse data of the storage data. The first switch transfers a reference data to the data-latching unit according to a first word-line signal. The second switch transfers the reference data to the data-latching unit according to a second word-line signal. The data-transferring unit decides whether or not to transfer the reference data to the bit-line according to the storage data and a control signal. The third switch receives the reference data and the control signal and transfers the reference data to the first switch, the second switch and the data-transferring unit according to the control signal.
摘要:
A static random access memory with data controlled power supply, which comprises a memory cell circuit and at least one Write-assist circuit, for providing power to the memory cell circuit according to data to be written to the memory cell circuit.
摘要:
This invention discloses a reduced-width, low-error multiplier that can be used in Digital Signal Processing (DSP). Specifically, this invention relates to a reduced-width, low-error multiplier capable of processing digital signals of communication systems such as a timing recovery circuit, a carrier recovery circuit, and a FIR filter, etc. This invention derives a binary compensation vector to compensate for the error caused by the reduction of area without any hardware overhead, and implements the compensation structure of an Array and a Booth multiplier to reduce hardware complexity.
摘要:
A low noise output buffer to simultaneously reduce switching noise and output signal ringing for output ringing and maintain DC current. A temporary and a steady-state output buffers are supplied by a buffer voltage source and an internal circuit voltage source, respectively. Each driver has a pull-up and a pull-down transistors. While switching the output buffer from a high voltage level to a low voltage level or from a low voltage level to a high voltage level, a predriver and a single steady-state circuit are designed to respectively generate a large simultaneous switching noise at the buffer voltage source and a small simultaneous switching noise at the internal circuit voltage source. A Schmitt trigger circuit is also used to turn off the temporary driver, so as to reduce the output signal ringing while the steady-state driver maintains a supply of DC current. In another design of a low noise output buffer to reduce ground bounces and output signal ringing as well as to maintain a DC current, a temporary driver is used. An adaptive characteristic of the low noise output buffer under different loading conditions is achieved by a feedback circuit. The temporary driver is turned on only during the middle period of output transition time to provide an additional charging or discharging current. Since the temporary driver is always off apart from the transition period, the effect of reducing ground bounces and output signal ringing can thus be outstanding.
摘要:
A threshold voltage measurement device is disclosed. The device is coupled to a 6T SRAM. The SRAM comprises two inverters each coupled to a FET. Power terminals of one inverter are in a floating state; the drain and source of the FET coupled to the inverter are short-circuited. Two voltage selectors, a resistor, an amplifier and the SRAM are connected in a negative feedback way. Different bias voltages are applied to the SRAM for measuring threshold voltages of two FETs of the other inverter and the FET coupled to the other inverter. The present invention uses a single circuit to measure the threshold voltages of the three FETs without changing the physical structure of the SRAM. Thereby is accelerated the measurement and decreased the cost of the fabrication process and measurement instruments.
摘要:
SRAM writing system and related apparatus are provided. The writing system of the invention has a dummy replica writing circuit, a negative pulse controller and at least a normal writing circuit; each normal writing circuit includes a write driver and a negative pulse supplier. While writing, the dummy replica writing circuit drives a dummy replica bit-line, such that the negative pulse controller generates a negative pulse control signal according to level of the dummy replica bit-line. In each writing circuit, when the write driver conducts to connect an associated bit-line to a bias end for driving a level transition, the negative pulse supplier switches the bias end from an operation voltage to a different negative pulse voltage according to the received negative pulse control signal.
摘要:
A static random access memory with data controlled power supply, which comprises a memory cell circuit and at least one Write-assist circuit, for providing power to the memory cell circuit according to data to be written to the memory cell circuit.
摘要:
SRAM writing system and related apparatus are provided. The writing system of the invention has a dummy replica writing circuit, a negative pulse controller and at least a normal writing circuit; each normal writing circuit includes a write driver and a negative pulse supplier. While writing, the dummy replica writing circuit drives a dummy replica bit-line, such that the negative pulse controller generates a negative pulse control signal according to level of the dummy replica bit-line. In each writing circuit, when the write driver conducts to connect an associated bit-line to a bias end for driving a level transition, the negative pulse supplier switches the bias end from an operation voltage to a different negative pulse voltage according to the received negative pulse control signal.
摘要:
The present invention provides a 6T SRAM including a first inverter, a second inverter, a first pass-gate transistor, and a second pass-gate transistor. The first inverter zs a first pull-up transistor and a first pull-down transistor. The second inverter includes a second pull-up transistor and a second pull-down transistor. The gate of the second pull-up transistor is coupled with the gate of the second pull-down transistor, and the drain of the second pull-up transistor is coupled with the drain of the second pull-down transistor. The SRAM can measure the trip voltage, the read disturb voltage, and the write margin by controlling the first bit line, the second bit line, the GND, the first word line, and the voltage source without changing of the physic parameter of the SRAM.
摘要:
A disturb-free static random access memory cell includes: a latch circuit having a first access terminal and a second access terminal; a first switching circuit having a first bit transferring terminal coupled to the first access terminal, a first control terminal coupled to a first write word line, and a second bit transferring terminal; a second switching circuit having a third bit transferring terminal coupled to the second access terminal, a second control terminal coupled to a second write word line, and a fourth bit transferring terminal coupled to the second bit transferring terminal; a third switching circuit having a fifth bit transferring terminal coupled to the fourth bit transferring terminal, a third control terminal coupled to a word line, and a sixth bit transferring terminal coupled to a bit line; and a sensing amplifier coupled to the bit line, for determining a bit value appearing at the bit line.