摘要:
A level shifting circuit (105) having a signal input that operates in a first voltage domain (LV DD ) and a signal output that operates in a second voltage domain (HV DD ). In some embodiments, the level shifting circuit includes a clocked level shifter. In some embodiments, the level shifting circuit includes a level shifting latch (208) that latches a translated output signal. In one example, the level shifting latch includes a latch portion and a stack of transistors (211, 213, 215, 217) with a transistor having a control electrode coupled to a clock input.
摘要:
A level shifting circuit (105) having a signal input that operates in a first voltage domain (LV DD ) and a signal output that operates in a second voltage domain (HV DD ). In some embodiments, the level shifting circuit includes a clocked level shifter. In some embodiments, the level shifting circuit includes a level shifting latch (208) that latches a translated output signal. In one example, the level shifting latch includes a latch portion and a stack of transistors (211, 213, 215, 217) with a transistor having a control electrode coupled to a clock input.
摘要:
A data path of a memory is from an array (34) of the memory (12), through a sense amplifier (36), through NOR gates (18, 26), through N channel transistors (20, 28), and through a latch (14, 16) that provides an output. The sense amplifier (36) provides complementary data to the NOR gates which provide an output to the N channel transistors (20, 28). The NOR gates (18, 26) provide outputs to the latch (14, 16). This has the affect of providing outputs to gates of one inverter (14) and drains of another inverter (16). Additional P channel transistors (44, 54) are in series with the inverters (14, 16) of the latch. The P channel transistor (44) that is in series with the inverters whose drains are receiving the signal is made to be nonconductive by the output of the NOR gate (26) to block current flow to the N channel transistor (46, 48) that is providing the input to the latch. The blocking of the current reduces the amount of current that the N channel transistor (46, 48) has to sink. This enables the N channel transistor (46, 48), even at a reduced voltage, to be sufficiently conductive to flip the state of the latch.
摘要:
A method for reducing the coupling noise in a Content Addressable Memory (CAM), the CAM having a first bitline pair and a second bitline pair, both pairs aligned along a first axis; a first memory cell connected to the first bitline pair and a second memory cell to the second bitline pair; having a first match line and a first word line aligned along a second axis, the first match line and the first word line connecting the first and the second memory cells defining a first row in a first column; having a second row adjacent the fist row, the second row comprising a third cell and a fourth cell, the third and fourth cells connecting the first and second bitline pairs and a second word line and a second match line, the method comprising arranging the first memory cell in a first orientation and the second memory cell in a second orientation, wherein the second orientation being a first axis mirror image to the first orientation; segmenting the first and second bitline pairs between the first row and the second row; adding a first twisting structure to the first bitline pair and a second twisting structure to the second bitline pair; arranging the third cell in a third orientation, the third orientation being rotated 180 degrees with respect to the first orientation; and arranging the fourth cell in a fourth orientation, the fourth orientation being rotated 180 degrees with respect to the second orientation.