The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A new architecture using a half-rate clock for pseudo-random-bit-sequence (PRBS) generator has been devised for high-speed and low-power operation. For proof of concept, a 27−1 PRBS generator IC was designed and fabricated with 290-GHz-fT InP HBT technology. The PRBS generator operates up to 100 Gbps with a low power consumption of 955 mW, leading to a record figure-of-merit of 1.42 mW·Gbps−1. This...
This paper presents an 18-to-32 GHz voltage-controlled phase shifter in a compact surface mount package for both 40- and 100-Gb/s optical transceivers. The InP HBT phase shifter chip includes a wideband vector modulator and a pseudo-sine-cosine generator that enables 810° phase control with only one control voltage. A quadrature splitter using a polyphase filter with Cherry-Hooper amplifiers enables...
This paper describes the circuit design and measured performance of a high-speed digital-to-analog converter (DAC) for a coherent optical transceiver based on digital signal processing (DSP). To achieve a high sampling rate, a novel double-sampling technique was devised. A 6-bit DAC test chip was fabricated with InP HBT technology, which yields a peak ft of 175 GHz and a peak fmax of 260 GHz. Measured...
We have developed a two-channel automatic-gain-controlled transimpedance amplifier IC by using InP heterojunction bipolar transistor (HBT) technology. The single-ended maximum S21 was 28 dB and the 3-dB bandwidth was 19 GHz. The estimated maximum differential transimpedance gain is 68 dBOmega. This IC is suitable for assembling a single-package two- channel photoreceiver for a compact 43-Gbit/s optical...
Progress in LSI technologies and circuit techniques has led to 40-Gbit/s electronic equalizers. A new InP-HBT decision-feedback-equalizer IC using a circuit technique that boosts speed exhibits good performance at 40 Gbit/s.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.