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.
This work introduces a monolithic 10GBase-LX4 limiting amplifier in a low-cost 0.18 mum CMOS digital process intended for optical fiber communications. The proposed configuration includes two inductorless frequency compensated voltage amplifiers. The topology also incorporates a conventional RC network in order to avoid drifts due to matching and temperature between -20 and 80degC. This circuit presents...
In this paper, a monolithic CMOS optical receiver designed in a 0.18mum digital process suitable for 10GBase-LX4 optical fiber transmissions is described. The system is based on CMOS actively loaded inverter structures and works with a single 1.8 V supply voltage. The thermal effects are minimized between -20 and 80 degC by using two different compensation techniques. The design presents optimized...
In this paper, two adaptive transimpedance amplifiers (TIAs) for optical communication receivers are presented and compared. Both TIAs are realized in a low-cost digital 0.35 mum CMOS process and fed from a single 1.8 V voltage supply. A transimpedance variation range of more than 12 dBOmega is attained with an almost constant bandwidth of about 1 GHz. The proposed configurations are characterized...
A novel envelope detector structure that overcomes the traditional tradeoff required in these circuits, improving both the tracking and keeping of the signal, which is specially advantageous for fast-settling circuits, is proposed in this paper. The method relies on holding the signal by two capacitors in parallel, discharging one when the other is in the hold mode and employing the held signals to...
A low-voltage intermediate-frequency variable gain amplifier (VGA) is proposed in this paper. The proposed circuit is based on a multiplier cell that has been improved to obtain higher linearity. Simulated in CMOS 0.35 mum technology, the VGA consumes 1.5 mA at a single 1.8 V supply. It shows a continuous gain setting from -18 up to 18 dB with a linearity error below 1 dB and an almost constant bandwidth...
In this paper we present a high frequency and low- voltage positive tunable CMOS transconductor using low cost 0.35 mum CMOS technology. The system works with 2.2 V supply voltage achieving operation frequencies and transconductances higher than 2 GHz and 750 muS. The circuit has been designed with an improved linearization technique based on the parallel of an NMOS transistor in saturation with another...
A new CMOS transimpedance amplifier (TIA) with variable gain for optical fiber communication receivers is presented in this paper. The proposed configuration is realized in a low-cost digital 0.35 mum CMOS process and fed from a single 1.8 V voltage supply. A 56-68 dBOmega transimpedance gain variation range is attained with 1 GHz bandwidth. The TIA shows 9 pA/VHz input-referred spectral noise and...
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.