摘要:
A delay component (312) for connecting to a logic component (302, 304), the delay component (312) having an input pin (314), an output pin (316) and a clock pin (318). The delay component (312) is configured to transmit data from the input pin (314) of the delay component to the output pin (316) of the delay component during a first phase of a clock signal received at the clock pin (318) of the delay component; and not to transmit data from the input pin (314) of the delay component to the output pin (316) of the delay component during a second phase of a clock signal received at the clock pin (318) of the delay component.
摘要:
A clocked D-type Flip-Flop circuit has a transmission gate to admit an input data and to provide an intermediate output to a clock-controlled inverter based on the clock signals. The clock-controlled inverter is used as a latch for latching the output signal from the transmission gate and releases the latched signal by the same clock signals to an output inverter. The output of the output inverter is the Q terminal of the Flip-Flop circuit. Another output inverter is used to invert the signal from the Q terminal into a complementary output signal. In one of the embodiments of the present invention, another transmission gate is used to condition the complementary output signal.
摘要:
A latch circuit includes a first latch that stores data provided from a data input terminal when a clock is provided from a clock input terminal, and stores scan data provided from a scan data input terminal when a first scan clock is provided from a first scan clock input terminal, a logical circuit that performs a logical operation for a second scan clock provided from the second scan clock input terminal and for an operational mode signal provided from the operation mode input terminal, and generates an update clock and a second latch including an update input terminal connected to an output terminal of the first latch, and an update clock input terminal connected to an output terminal of the logical circuit, the second latch holds the data or the scan data provided from the update input terminal when the update clock is provided.
摘要:
A differential cascode structure is configured to propagate a data state to a static latch at each active edge of a clock. A clock generator enables the communication of the data state and its inverse to the latch for a predetermined time interval. In a first embodiment, each cascode structure includes three gates in series, the gates being controlled by the clock signal, a delayed inversion of the clock signal, and the data state or its inverse. In an alternative embodiment, each cascode structure includes two gates in series, the gates being controlled by the clock signal and the delayed inversion of the clock signal. In this alternative embodiment, each of these cascode structures is driven directly by the data signal or its inverse. The static latch obviates the need to precharge nodes within the device, thereby minimizing the power consumed by the device. The latch preferably comprises cross-coupled inverters, which, being driven by the differential cascode structure, enhance the switching speed.
摘要:
A method and apparatus for storing data in a master flip flop, comprising in combination receiving a clock signal having a first and second state, storing a master data state in a master storage device having a master storage input and a master storage output, storing a master complement data state in a master complement storage device having a master complement storage input and a master storage complement output, receiving a data input signal by a transmission gate, receiving a complement data input signal by a complement transmission gate, overriding the master storage complement output with the data input signal when the clock is in the first state, overriding the master storage output with the complement data input signal when the clock is in the first state, disconnecting the master storage complement output from the data input signal when the clock is in the second state, and disconnecting the master storage output from the complement data input signal when the clock is in the second state. The set-up time for the transmission gate is less than two transistor gate delays.
摘要:
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.
摘要:
A flip-flop having one or more stages (e.g., a master stage and a slave stage in a master-slave flip-flop, or a single stage as in a latch), at least one stage having a driver coupled at its input and output to a feedback path with a gated inverter having embedded preset and/or clear logic. By embedding the preset/clear logic in the feedback path, the driver can be implemented using a simple inverter. Moreover, the preset and/or clear functionality can be added without adversely affecting either the setup time or the clock-to-Q propagation time of the flip-flop.
摘要:
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.
摘要:
A latch circuit (X, Y) for eliminating slew current flowing in between power sources during period when clock signal changes. In the latch circuit(X, Y), an input terminal is formed in such a way that dual transfer gates are connected to respective nodes remaining differential signal of bistable circuit which is constituted that one pair of clocked · CMOS inverter is subjected to mesh connection. An output terminal of holding signal of latch circuit is drains of PMOS and NMOS transistors being adjacent to end terminal of power source, which transistors are member of the one pair of clocked · CMOS inverter. Gates of PMOS and NMOS transistors being adjacent to side of output terminal are taken to be input terminal of gate signal of the latch circuit. During period of sampling calculation, since there exists MOS transistor which is connected in series between power sources and which is sure to stand of OFF state, it is capable of cutting transient slew current flowing between power sources (91, 92).