Industrial Technology Research Institute

Tsinghua University

Min-Sheng Kao

Cheng-Da Shaw

Chiung-Hung Wang

Cheng-Hung Tsai

Shun-Tien Lee

Jen-Ming Wu

Yu-Hao Hsu

Cheng-Ta Hsiao

Chia-Shy Chang

Kun-Yi Shen

Chia-Hung Chiu

Pen-Yu Chen

A broadband high output current output stage includes at least one first differential pair for enhancing the bandwidth. A second differential pair is further disposed in the circuit. The second differential pair is coupled to one of the first differential pair, such that a large output voltage swing is distributed to all transistors to avoid breakdowns thereof. A feedback unit is connected between each bias unit and the first differential pair. The first compensation unit compensates the electric characteristic of the high-frequency zero of the feedback unit and the bias unit, thereby broadening the linear bandwidth of the frequency response. The second compensation units are disposed between the first differential pairs. Each second compensation unit compensates the high-frequency zero of the node where each two first differential pairs are cascaded, thereby further broadening the linear bandwidth of the frequency response.

Broadband high output current output stage

The invention discloses an active back-end termination circuit, which comprises a first resistor, a first transistor, a second resistor, and a second transistor. The first resistor and the first transistor are connected in series for forming a first impendence unit. A first source of the first transistor is connected to a working voltage with V. The second resistor and the second transistor are connected in series for forming a second impendence unit. A second gate and a second drain of the second transistor are connected to the working voltage with V. Wherein, the first impendence unit and the second impendence unit are connected in parallel. The first transistor or the second transistor is switched on through a power source, and the first transistor and the second transistor change the impedance actively for matching a load according to the voltage source.

Active back-end termination circuit

A light transceiver module is designed for electronic devices. It forms an electric connection with the electric connector of the electronic device. The light transceiver module contains a base, a light-emitting device for providing optical signals, a light-receiving device for receiving optical signals, and a main circuit board. The base supports the light-emitting device, the light-receiving device, and the main circuit board. The main circuit board has a pluggable electric connector for connections with the electric connector of the electronic device. The light transceiver module can be used to simplify and optimize the devices using it.

Light transceiver module

An assembly apparatus for an optical transceiver has a positioning device and an assembly device. The assembly device has a base, a transverse adjustment mechanism adjustably mounted on the base, a clamping mechanism mounted on the transverse adjustment mechanism for clamping a control circuit board, a height adjusting mechanism adjustably mounted on the transverse adjustment mechanism, a longitudinal adjustment mechanism adjustably mounted on the height adjusting mechanism and element holding mechanism adjustably mounted on the longitudinal adjustment mechanism for holding a optical element. Accordingly, an optical transceiver can be conveniently assembled and tested with the assembly apparatus.

Assembly apparatus for an optical transceiver

A packaging method of the optical transceiver module for transmitting optical signals is disclosed. The invention includes a base, a case, a transmission unit and receiving unit. The transmission unit and the receiving unit contain a circuit board, respectively. The base provides two fixing positions for the installation of the two circuit boards. The two circuit boards are installed horizontally and vertically, respectively. This design increase the utilization of the inner space providing ideal shielding for the elements and circuit boards. A central beam is used to fix the structure and case in a drawable way like a matchbox. This reduces covered area of the circuit board, making the elements easy to be tested and assembled.

Packaging for optical transceiver module

A packaging method of the optical transceiver module for transmitting optical signals is disclosed. The invention includes a base, a case, a transmission unit and a receiving unit. The transmission unit and the receiving unit contain a circuit board, respectively. The base provides two fixing positions for the installation of the two circuit boards. The two circuit boards are installed horizontally and vertically, respectively. This design increases the utilization of the inner space, providing ideal shielding for the elements and circuit boards. A central beam is used to fix the structure and case in a drawable way like a matchbox. This reduces covered area of the circuit board, making the elements easy to be tested and assembled.

An organic electroluminescence (OEL) matrix-type single-pixel driver, which comprises: an OEL device, a first transistor, and a second transistor. The first transistor and the second transistor form a complementary structure so that when the data line uses the first transistor to drive an organic light-emitting diode (OLED) device, the second transistor is in the OFF state, causing no power consumption. When the data line is in the LOW state, the first transistor is in the OFF state. The second transistor is in a sub-threshold state after getting rid of extra charges.

Growing community of inventors

Tucheng, Taiwan

Min-Sheng Kao