Abstract:
An active power supply filter effectively eliminates power supply noise using a resistive element and a capacitive element coupled at a node, and a switch with a control terminal controlled by the node. The active power supply filter is suitable for high frequency operation of a voltage-controlled oscillator (VCO) in a phase-locked loop (PLL) of a high-speed microprocessor. The active power supply filter removes VCO noise that would otherwise create jitter that reduces the effective clock cycle of the microprocessor. The active power supply filter is similarly useful in applications other than VCOs, PLLs, and microprocessors in which removal of substantial amounts of noise from the power supply is useful.
Abstract:
An active power supply filter effectively eliminates power supply noise using a resistive element and a capacitive element coupled at a node, and a switch with a control terminal controlled by the node. The active power supply filter is suitable for high frequency operation of a voltage-controlled oscillator (VCO) in a phase-locked loop (PLL) of a high-speed microprocessor. The active power supply filter removes VCO noise that would otherwise create jitter that reduces the effective clock cycle of the microprocessor. The active power supply filter is similarly useful in applications other than VCOs, PLLs, and microprocessors in which removal of substantial amounts of noise from the power supply is useful.
Abstract:
A highly suitable power conservation technique involves extending multiple word lines over a memory array row and connecting a portion of the memory cells of the memory array row to each of the word lines. Power is supplied only to the portion of the memory cells that is accessed, eliminating the static power consumption of the non-accessed memory cells. By connecting multiple word lines to select a portion of a memory row, a column address of the memory is mapped into a row decode space. Multiple metal layers in a complex integrated circuit may be exploited to form cache block select lines using multiple word lines per cell row. A storage includes a plurality of storage cells arranged in an array of rows and columns, a plurality of bit lines connecting the array of storage cells into columns, and a plurality of word lines connecting the array of storage cells into rows. The plurality of word lines include multiple word lines for a single row of the plurality of rows so that multiple portions of the storage cells in the single row are addressed by corresponding multiple word lines.
Abstract:
A memory includes a data bit line and a reference bit line. Word lines in the memory are connected to the bit lines by transistors. The transistors on data bit lines and the reference bit lines are substantially the same size. The capacitances on the data bit lines are substantially the same as the capacitances on the reference bit lines. When the word line is activated, the bit lines express a steady-state voltage that is a function of the resistance of the bit lines. In one example, the data bit lines have a resistance (R) and the reference bit lines have half the resistance (R2). The same current is sourced to the data bit lines and the reference bit lines so that the steady-state voltage of the data bit line differs from the steady-state voltage of the reference bit line by a factor equal to the ratio of the resistances. The resistors (R and R2) perform two functions, the resistors clamp level of the bit lines that are being discharged to stop the displacement current. The data bit lines are sensed differentially with respect to the reference.
Abstract:
A Self-Timed Pulse Control circuit and operating method is highly useful for adjusting delays of timing circuits to prevent logic races. In an illustrative example, the STPC circuit is used to adjust timing in self-timed sense amplifiers. The Self-Timed Pulse Control (STPC) circuit is integrated onto an integrated circuit chip along with the circuit structures that are timed using timing structures that are adjusted using STPC. The STPC is also advantageously used to modify the duty cycle of clocks, determine critical timing paths so that overall circuit speed is optimized, and adjusting dynamic circuit timing so that inoperable circuits become useful.
Abstract:
A highly suitable power conservation technique involves extending multiple word lines over a memory array row and connecting a portion of the memory cells of the memory array row to each of the word lines. Power is supplied only to the portion of the memory cells that is accessed, eliminating the static power consumption of the non-accessed memory cells. By connecting multiple word lines to select a portion of a memory row, a column address of the memory is mapped into a row decode space. Multiple metal layers in a complex integrated circuit may be exploited to form cache block select lines using multiple word lines per cell row. A storage includes a plurality of storage cells arranged in an array of rows and columns, a plurality of bit lines connecting the array of storage cells into columns, and a plurality of word lines connecting the array of storage cells into rows. The plurality of word lines include multiple word lines for a single row of the plurality of rows so that multiple portions of the storage cells in the single row are addressed by corresponding multiple word lines.
Abstract:
A memory includes a data bit line and a reference bit line. Word lines in the memory are connected to the bit lines by transistors. The transistors on data bit lines and the reference bit lines are substantially the same size. The capacitances on the data bit lines are substantially the same as the capacitances on the reference bit lines. When the word line is activated, the bit lines express a steady-state voltage that is a function of the resistance of the bit lines. In one example, the data bit lines have a resistance (R) and the reference bit lines have half the resistance (R2). The same current is sourced to the data bit lines and the reference bit lines so that the steady-state voltage of the data bit line differs from the steady-state voltage of the reference bit line by a factor equal to the ratio of the resistances. The resistors (R and R2) perform two functions, the resistors clamp level of the bit lines that are being discharged to stop the displacement current. The data bit lines are sensed differentially with respect to the reference.