Other

Opnext Japan, Inc.

Tomoaki Shimotsu

Takayuki Nakao

Yasuhiro Yamada

Tadashi Hatano

Tomonao Kikuchi

Toshiaki Murai

Akihiro Hayami

Masayuki Miyoshi

Hidehiro Ikeuchi

Tohru Oyama

Tadaaki Fujii

Atsushi Hasegawa

Keiichi Yamamoto

Norio Chujo

Katsunori Hirano

Takeshi Yamashita

Tetsuya Aoki

Akio Osaki

A sample & hold type phase detector is used in a CDR IC and, in jitter transfer bandwidth adjustment, VCO output waveforms 90&#xb0; out of phase with each other can be inputted to the phase detector, whereby a jitter transfer bandwidth can be calculated by only the measurement of frequency and of a DC voltage and it is possible to make a jitter transfer bandwidth adjustment in DC test for IC.

Optical modules and methods of making the optical modules

A temperature compensating circuit includes a first circuit network between an inverting input terminal of an operational amplifier and an output terminal of the operational amplifier , and a second circuit network between the inverting input terminal of the operational amplifier and a reference potential. At least one of the first circuit network and the second circuit network is made of an arrangement containing a plurality of series-connected thermistor/resistor pairs in which the thermistors are connected parallel to the resistors, and the temperature compensating circuit compensates a temperature-dependent signal which is inputted into a positive phase input terminal of the operational amplifier , and outputs the temperature-compensated signal.

Temperature compensating circuit, temperature compensating logarithm conversion circuit and light receiver

Growing community of inventors

Yokohama, Japan

Tomoaki Shimotsu