This paper presents a new CMOS current feedback operational amplifier (CFOA) with rail to rail swing capability at all terminals. The circuit operates as a class AB for lower power consumption. Besides operating at low supply voltages of 1.5 V, the proposed CFOA has a standby current of 200 A. The proposed CFOA circuit is thus a versatile building block for low voltage low power applications. T...

In this paper a current mode very low voltage (LV) (1 V) and low power (LP) (21 μW) differential difference second generation current conveyor (CCII) is presented. The circuit is developed by applying the current sensing technique to a fully balanced version of a differential difference amplifier (DDA) so to design a suitable LV LP integrated version of the so-called differential difference CCI...

In this paper, a cardiac sense amplifier, i.e. the front end of a pacemaker, based on the Dynamic Translinear (DTL) circuit technique is presented. The system consists of a voltage-to-current converter, a bandpass filter, absolute value and RMS-DC converter circuits and an event detection circuit. From simulations, it is demonstrated that the DTL technique is a good alternative to conventional ...

A pseudodifferential CMOS operational transconductance amplifier (OTA) with wide tuning range and large input voltage swing has been designed for very small ’s (of the order of a few nanoamperes per volt). The OTA is based on a modified four-quadrant multiplier architecture with current division. A common-mode feedback circuit (CMFB) structure has been proposed and designed using floating-gate ...

We propose and experimentally demonstrate a continuous wave (CW) tunable-wavelength fiber laser using self-seeding Fabry-Perot laser diode (FP-LD) without optical amplifier inside gain cavity. By employing a tunable bandpass filter (TBF) and a fiber reflected mirror (FRM) within a gain cavity, the fiber laser can lase a single-longitudinal wavelength due to the self-seeding operation. The propo...

ABSTRACT Satellite communication systems suffer from nonlinear intersymbol interference due to the limited bandwidth of the filters and the need to operate the onboard amplifier near saturation. We consider the blind equalization problem for this class of systems in a multichannel setting. By exploiting the bandpass nature of the channel and the statistical properties of PSK constellations, a s...

By using a newly designed bidirectional erbium-doped fiber amplifier, we demonstrated a 2 = 2.5 Gbrs repeated bidirectional transmission over a 100-km single-mode fiber. Two tunable optical bandpass filters were used to suppress the Rayleigh backscattering and amplified spontaneous emission in the bidirectional transmission system. The bit error rate performances were measured for both directio...

Complex bandpass ΔΣAD modulators can provide superior performance to a pair of real bandpassΔΣAD modulators of the same order. They process just input I and Q signals, not image signals, and AD conversion can be realized with low power dissipation, so that they are desirable for such low-IF receiver applications. This paper proposes a new architecture for complex bandpass ΔΣAD modulators with n...

This paper presents a new CMOS fully differential second-generation current conveyor (FDCCII). The proposed FDCCII is based on a fully differential difference transconductor as an input stage and two class AB output stages. Besides the proposed FDCCII circuit is operating at supply voltages of ± 1.5 V, it has a total standby current of 380 μA. The application of the FDCCII to realize variable g...

Using an electro-absorption duplexer (EAD) we presented a transceiver (TRx) module for dual function of both electrical-to-optical (E/O) and optical-to-electrical (E/O) conversion at 60 GHz band. The EAD chip was fabricated by monolithically integrating both a waveguide photodiode (PD) and an electro-absorption modulator (EAM) in association with traveling wave electrodes. We also investigated ...