摘要:
Disclosed is a means for enhancing logic circuit performance and more particularly, for enhancing the switching speeds of a variety of logic circuits. What is involved is the insertion of a so called "snap" or enhancement transistor connected to a common node defining an output of a basic logic circuit. In one example, the emitter of this "snap" transistor is connected to an output node in the circuit, which in conventional practice would be charged during an upgoing transition by a fixed RC time constant. In accordance with the present improvement, however, the "snap" transistor, due to charge stored therein, remains conducting--although the associated logic device is turned off. This current discharges as reverse base current and the output provides what appears to be an inductive voltage spike. The effect is that a temporary source of current is available to charge the common node. As a result, the transition time involved in going from one voltage level to another at the output node is substantially reduced.
摘要:
A programmable Local Clock Buffer has a single inverter between the clock input and the delayed clock output. A transistor switch modulates the single inverter stage between a clock signal transmit state and a non-transmitting state. A combination of delay select bits control the timing of the beginning and ending of the transmit state of the inverter relative to the clock input via the transistor switch.
摘要:
A cache memory high performance pseudo dynamic address compare path divides the address into two or more address segments. Each segment is separately compared in a comparator comprised of static logic elements. The output of each of these static comparators is then combined in a dynamic logic circuit to generate a dynamic late select output.
摘要:
A test circuit and programmable voltage divider that may be used in the test circuit. The programmable voltage divider develops a voltage difference signal that may be digitally selected. The test circuit may be used to test and characterize sense amplifiers. The programmable voltage divider develops a signal with a selected polarity and magnitude that is provided to a sense amplifier being tested. The sense amplifier is set and its output latched. The latch contents are checked against an expected value. The difference voltage may be changed and the path retested to find passing and failing points.
摘要:
A CMOS static random access memory (SRAM) cell array, an integrated chip including the array and a method of accessing cells in the array with improved cell stability. Bit lines connected to half selected cells in the array are floated during cell accesses for improved cell stability.
摘要:
A domino SRAM is provided with active pull-up PFET devices that overwhelm “slow to write but very fast to read” cells and allow the cells to recover from timing mismatch situations. This approach allows the traditional “bit select” clamp to actively control the “local select” through “wired-or” PFET pull-up transistors. Separate read and write global “bit line” pairs allow the read and write performance to be optimized independently.
摘要:
The disclosure is directed to an improved random access memory (RAM). More particularly, to improved word line selection circuitry for use in an array employing CTS (Complementary Transistor Switch) type memory cells.
摘要:
An improved method for performing a write through operation during a write operation of a SRAM cell (10) of a SRAM array (1) is disclosed. The method comprises suppressing a false write through data propagation at an output node (C, F) of the SRAM array (1) in case of a failure causing transition at a first node (t) or a second node (c) of the SRAM cell (10) by using information about the input data (data, data_b) to be written in the SRAM cell (10) and read data propagation paths to retain the output node (C, F) after a global bit line (gb_t, gb_c) at a precharge level independently from a logical level of the global bit line (gb_t, gb_c), if a corresponding node (c, t) of the SRAM cell (10) is performing the failure causing transition based on input data (data, data_b) to be written in the SRAM cell (10).
摘要:
A test circuit and programmable voltage divider that may be used in the test circuit. The programmable voltage divider develops a voltage difference signal that may be digitally selected. The test circuit may be used to test and characterize sense amplifiers. The programmable voltage divider develops a signal with a selected polarity and magnitude that is provided to a sense amplifier being tested. The sense amplifier is set and its output latched. The latch contents are checked against an expected value. The difference voltage may be changed and the path retested to find passing and failing points.