摘要:
A phase-locked loop (PLL) with novel phase detection mechanism is provided, including a phase frequency detector (PFD), a controller, a digital-to-analog (D2A) module, and a voltage-controlled oscillator/current-controlled oscillator (VCO/ICO), wherein PFD has a reference signal input and an input from output signal of the VCO/ICO and is connected to the controller, the controller is then further connected to D2A module, D2A module converts the control signal from the controller into an analog voltage to control the frequency and phase of VCO/ICO. It is worth noting that the PFD of the present invention has a novel phase detection mechanism so that the phase detection does not rely on edge alignment. In addition, the novel phase detection mechanism also allows flexible reference signal input, as opposed to the aforementioned fixed external source, such as, a crystal.
摘要:
A phase-locked loop (PLL) with novel phase detection mechanism is provided, including a phase frequency detector (PFD), a controller, a digital-to-analog (D2A) module, and a voltage-controlled oscillator/current-controlled oscillator (VCO/ICO), wherein PFD has a reference signal input and an input from the output signal of the VCO/ICO and is connected to the controller, the controller is then further connected to the D2A module, the D2A module converts the control signal from the controller into an analog voltage to control the frequency and phase of VCO/ICO. It is worth noting that the PFD of the present invention has a novel phase detection mechanism so that the phase detection can be accomplished by observing signal level transitions of the reference signal input and a delayed reference signal with respect to the output signal of the VCO/ICO without edge alignment. In addition, the novel phase detection mechanism also allows flexible reference signal input.
摘要:
An apparatus for generating multi-phase clock signals with a ring oscillator is provided, including a first stage phase-blender module and a second stage phase-blender module. The first stage phase-blender module further includes a plurality of differential OP phase-blender circuits. Each differential blender circuit has two signal inputs, and an output signal whose phase is an interpolation of the two input signal. The second stage phase blender module includes a plurality of inverter phase-blender circuits. Each inverter phase-blender circuit receives two output signals from the first stage phase-blender module as inputs, and outputs a clock signal with the interpolated phase of the two output signals of the first stage phase-blender module. The present invention also provides a method for generating multi-phase clock signals with a ring oscillator, including the following steps: (1) using a ring oscillator to provide at least two non-full swing signals, (2) using an differential OP phase-blender circuit to blend the phases of two non-full signals from the ring oscillator, and (3) using an inverter phase-blender circuit to generate multi-phase clock signal with interpolated phase.
摘要:
An apparatus for generating multi-phase clock signals with a ring oscillator is provided, including a first stage phase-blender module and a second stage phase-blender module. The first stage phase-blender module further includes a plurality of differential OP phase-blender circuits. Each differential blender circuit has two signal inputs, and an output signal whose phase is an interpolation of the two input signals. The second stage phase blender module includes a plurality of inverter phase-blender circuits. Each inverter phase-blender circuit receives two output signals from the first stage phase-blender module as inputs, and outputs a clock signal with the interpolated phase of the two output signals of the first stage phase-blender module.
摘要:
An apparatus of storage medium for interface both USB host and USB OTG device is provided, including a USB module, a micro USB module, a control module, a storage module, where the control module is connected to the USB module, the micro USB module and the storage module, and provides signals to determine and control the data flow among the above modules. The apparatus can be connected to a USB host via the USB module and/or a USB OTG device via the micro USB module to access data in the storage module. The storage module can be realized as, for example, a pendrive module, a memory card reader with memory card, or a pendrive module plus a memory card reader with memory card. When connected to both a USB host and a USB OTG device simultaneously, the apparatus of the present invention can function as a USB cable.
摘要:
An apparatus for automatically detecting and differentiating between a USB host and a USB device is provided. In a device with a USB interface, the present invention is coupled with the VBUS pin of the USB interface of the device. By monitoring the voltage change on the VBUS pin, the present invention determines whether the external device connected through the USB interface is a USB host or a USB device. The apparatus for automatically detecting and differentiating between a USB host and a USB device of the present invention includes a voltage detection circuit and a voltage detector. The voltage detection circuit is coupled with the voltage detector and the VBUS pin of the USB interface. The voltage detection circuit can be a voltage splitter. The voltage of voltage detection circuit can be changed according to the voltage signal inputted externally from the VBUS pin of the USB interface. The voltage detector is used to detect the voltage change of node A of voltage detection circuit to determine whether the external device connected through the USB interface is a USB host or a USB device.
摘要:
The present invention provides a SATA cable with light display feature, which is mainly used for the SATA cables for computer host and their peripheral devices. With the light display capability, the connection readiness status and the signal transmission conditions can be easily detected via the pins on the SATA cable. The realization technique used by the present invention is adding the LED lights and the control pins inlayed at the two plug-in ends of the SATA cable. When the two plug-in ends of the SATA cable are both connected and ready, or there is data transmission going on, the control pins automatically turn on the LED lights to indicate the ON/ACTIVE connection status/condition.
摘要:
A micro-connector with flatly disposed pins is provided, including a plug unit and a metal shell. The plug unit includes an insulation element, a plug, and a plurality of pins, wherein the plug and a plurality of pins are disposed on opposite sides of the insulation element. The metal ends of the pins penetrate through the inside of the insulation element to extend into the plug for electrical connection. The metal shell is engaged to the insulation element, with extending positioning pins. The insertion direction of the positioning pins forms an angle with the insertion direction of the plug. The angle is preferably between 45°-135° so as to enable easy assembly and good fastening result.
摘要:
An apparatus and method for automatically switching between USB host and device is provided. In a device with a USB interface, the present invention automatically switches between a USB host and USB device by detecting the handshake protocol of the D+ and D− pins of the USB interface. The apparatus for automatically switching between USB host and device includes ah host mode element, a device mode element, a random auto-switcher, and a detection element. The random auto-switcher switches the connection to the host mode element or the device mode element at random time. The detection element monitors the handshake protocol of the D+ and D− pins of USB interface and the external USB-interface device to determine whether the host mode or the device mode is in use. When the present invention detects the external USB-interfaced device is a host, the present invention switches to become a USB device. Similarly, when the present invention detects the external USB-interfaced device is a USB device, the present invention switches to become a USB host.
摘要:
An improved SATA interface is provided by integrating a power line into a standard ATA interface. One end of the power line is connected to the power pin of the PC and the other end is connected to the power pin of the device, so that the device can draw power from the PC. This saves the power supply design in the external devices, simplifies the device wiring and reduces the manufacture cost.