Other

United Microelectronics Corp.

Yu-Lin Chen

Wei-Jen Wang

Chien-Fu Chen

Kun-Yuan Wu

Ruei-Yau Chen

Cheng-Yang Tsai

Chen-Hsien Hsu

Yuan-Hui Chen

Zhi-Hong Huang

Cheng-Tsung Ku

A delay cell includes a cascode transistor and an inverter. The cascode transistor is used to receive a control voltage to generate a bias current, and includes a source terminal, a drain terminal, and a gate terminal receiving the control voltage. The inverter is coupled to the cascode transistor and used to generate an output signal according to the bias current in response to an input signal.

Analog delay cell having continuous adjustable delay time

The invention provides a testkey detection circuit, including a plurality of oscillators and a driving circuit. Each of the oscillators has an enable terminal, a voltage terminal and an output terminal, wherein the enable terminals are connected to a common enable terminal. The driving circuit receives the output terminals of the oscillators and increases a driving level of a selected one of the output terminals as a frequency output.

Testkey detection circuit

A speed-up charge pump includes a first charge pump for receiving an up signal and a down signal in digital form to produce a first voltage control signal at an output node. Further, at least one speed-up phase detector includes a first circuit path to receive the up signal and delay the up signal by a predetermined delay as a delay up signal and operate the up signal and the delay up signal by AND logic into an auxiliary up signal; and a second circuit path to receive the down signal and delay the down signal by the predetermined delay as a delay down signal and operate the down signal and the delay down signal by AND logic into an auxiliary down signal. A second charge pump is respectively receiving the auxiliary up and down signals to produce a second voltage control signal also at the output node.

Speed-up charge pump and phase-locked loop and method for operating the same

A liftable puller device includes a holder, a puller assembly located on the holder, a first frame coupled with the holder and a second frame coupled with the puller assembly. The puller assembly is installed on the holder via the first frame and second frame, and includes a plurality of grippers to grip a wheel. The first frame has a first main retaining zone located on the top end thereof, two first sub retaining zones relative to the first main retaining zone and a first auxiliary retaining zone between the first main retaining zone and one first sub retaining zone. By providing the first auxiliary retaining zone, only a small range of movement is needed to complete switch between a two-gripper and a multi-gripper puller device.

Liftable puller device

A device for mounting a bearing onto a shaft includes a tubular pushing member having three wings extending radially outward therefrom. Each of the wings has a rod slidably and perpendicularly connected thereto so as to contact the bearing on the shaft. A threaded rod extends through a passage in the pushing member and an engaging device is on a first end of the threaded rod so as to engage with the shaft. A rotatable member rotatably contacts the pushing member and is threaded mounted to a second end of the threaded rod so that the pushing member together with the rods are moved to push the bearing by rotating the rotatable member.

Device for mounting bearings onto a shaft

A device for mounting a bearing onto a shaft includes a tube connected to the shaft and having an open end. Three grooves are defined longitudinally in the tube and communicate with the open end. A pushing member has three wings extending radially outward therefrom and the wings are movably received in the grooves. Each of the wings has a rod slidably and perpendicularly connected thereto so as to contact a surface of the bearing. A hydraulic pushing rod pushes the pushing member toward the shaft so that the bearing is moved on the shaft.

Growing community of inventors

Taichung, Taiwan

Yu-Lin Chen