A phase interpolating (PI) system includes: a phase-interpolating (PI) stage configured to receive first and second clock signals and a multi-bit weighting signal, and generate an interpolated clock signal, the PI stage being further configured to avoid a pull-up/pull-down (PUPD) short-circuit situation by using the multi-bit weighting signal and a logical inverse thereof (multi-bit weighting_bar signal); and an amplifying stage configured to receive and amplify the interpolated clock signal, the amplifying stage including a capacitive component; the capacitive component being tunable; and the capacitive component having a Miller effect configuration resulting in a reduced footprint of the amplifying stage.

A parallel-to-serial converter includes first to fourth input nodes configured to receive first to fourth data input signals, respectively, and an output node configured to output a data output signal. First to fourth logic circuits are provided, which are configured to electrically couple respective ones of the first to fourth input nodes one-at-a-time to the output node, in synchronization with first to fourth clock signals. The first logic circuit includes a first input circuit, a second input circuit, and an output circuit electrically coupled to the first and second input circuits. The output circuit includes a first pull-up transistor and a first pull-down transistor having drain terminals coupled to the output node, a second pull-up transistor connected between a source terminal of the first pull-up transistor and a first power supply node, and a second pull-down transistor connected between a source terminal of the first pull-down transistor and a second power supply node.

A serial receiver combines continuous-time equalization, analog interleaving, and discrete-time gain for rapid, efficient data reception and quantization of a serial, continuous-time signal. A continuous-time equalizer equalizes a received signal. A number N of time-interleaved analog samplers sample the equalized continuous-time signal to provide N streams of analog samples transitioning at rate reduced by 1/N relative to the received signal. A set of N discrete-time variable-gain amplifiers amplify respective streams of analog samples. A quantizer then quantizes the amplified streams of analog samples to produce a digital signal.

In an embodiment, a system includes a slave circuit configured to receive an external clock signal from a master circuit, the slave circuit comprising first and second peripherals configured to receive respective clock signals obtained from the external clock signal, wherein the master circuit is configured to send to the slave circuit the external clock signal according to two different timing modes, wherein the slave circuit comprises a logic circuit configured to provide a locking signal to the first peripheral circuit when the logic circuit detects a given operating mode of the slave circuit, wherein the master circuit is configured to send the external clock signal according to a first timing mode before receipt of the locking signal, and wherein the master circuit is configured, following upon receipt of the locking signal, to send the external clock signal according to a second timing mode different from the first timing mode.

A method and apparatus for dynamically monitoring, measuring, and adjusting a clock duty cycle of an operating storage device is disclosed. A storage device includes a measuring circuit comprising a plurality of flip flop registers coupled to a first input line, with each flip flop register having a first input and a second input. One or more delay taps are coupled to each flip flop register, and are disposed on a second input line. While the device operates, a clock signal is input directly into the first input of each flip flop register via the first input line. Simultaneously, the clock signal is input into the second input of each flip flop register through the one or more delay taps via the second input line. The flip flop registers are then read to determine the clock duty cycle of the device, and the clock frequency is adjusted as needed.

A duty cycle correction circuit includes: a first inverter, a first delayer, and a first adjustment circuit. An input terminal and output terminal of the first inverter are respectively configured to receive a first signal and output a third signal. A first input terminal and an output terminal of the first adjustment circuit are respectively configured to receive the third signal and output a first correction signal. An input terminal and output terminal of the first delayer are respectively configured to input a second signal and output a fourth signal to the first adjustment circuit. The fourth signal has a first delay time relative to the second signal. When the third signal and the fourth signal are at a high level, so is the first correction signal. When the third signal and the fourth signal are at a low level, so is the first correction signal.

Circuits and methods for delay mismatch compensation are described. A circuit may comprise multiple data paths between a signal source, such as a driver, and a load. The paths may have different lengths, thus causing delay mismatches. An exemplary circuit of the type described herein may comprise delay elements and at least one feedback circuit designed to compensate for such delay mismatches. The circuit may operate in different phases, such as a compensation phase and a driving phase. In the compensation phase, rings oscillators including delay elements and the at least one feedback circuit may be formed. In this phase the delay may be adjusted to compensate for mismatches. In the driving phase, the signal source may be connected to the load.

The invention relates to a time-delay circuit (1) for a digital signal (3), particularly for a clock signal, comprising:

an input (2) for the digital signal (3);
an oscillator (4) for generating an internal clock signal (5);
at least one delay channel (6) adding a certain delay to the digital input signal (3) based on the internal clock signal (5); and
an output (7) for a delayed digital signal (8).

Reduced-power dynamic data circuits with wide-band energy recovery are described herein. In one embodiment, a circuit system comprises at least one sub-circuit in which at least one of the sub-circuits includes a capacitive output node that is driven between low and high states in a random manner for a time period and an inductive circuit path coupled to the capacitive output node. The inductive circuit path includes a transistor switch and an inductor connected in series to discharge and recharge the output node to a bias supply. A pulse generator circuit generates a pulse width that corresponds to a timing for driving the output node.

An apparatus includes a clockless delay adaptation loop configured to adapt to random data. The apparatus also includes a circuit coupled to the clockless delay adaptation loop. The clockless delay adaptation loop includes a cascaded delay line and an autocorrelation control circuit coupled to the cascaded delay line, wherein an output of the autocorrelation control circuit is used to generate a control signal for the cascaded delay line.