In this paper presents a optimization of linearity of low noise amplifier by using post linearization techniques. in this technique we have used diode connected mosfet as IMD sinker also used interstage matching for gain enhancement and reducing the effect of nonlinearity in common gate stage of cascode amplifier, this has done by using UMC .18um CMOS Technology in cadence tool. We got gain 14d...

An optical receiver for 40 Gbit=s communication systems with 8274 V=W conversion gain and 950 mVp–p limiting differential output is reported. A back-to-back sensitivity of 9.4 dBm at a bit error rate of 10 12 was observed for a 2 1 pseudorandom binary sequence. The receiver incorporates an InP based pin diode, a transimpedance amplifier and a limiting amplifier. This is the largest conversion g...

The power spectrum is calculated of the output of an optical amplifier with frequency-dependent gain for the case in which the input consists of one excited mode that is in an arbitrary quantum state and an infinite set of other modes that are in the vacuum state. The power spectrum is found to be independent of the particular quantum state of the excited input mode and to depend only on the sh...

In this paper we have describes the design of current mode instrumentation amplifier (CMIA) for bio-signal Acquisition system. The current mode instrumentation amplifier technology is based on voltage mode operational amplifier (op amp) power supply current sensing technique. There are two design challenges of this topology. First one is the Op amp mismatch and second is precise current mirrors...

A dual-path amplifier topology with dual-loop parallel compensation technique is proposed for low-power three-stage amplifiers. By using two parallel high-speed paths for high-frequency signal propagation, there is no passive capacitive feedback network loaded at the amplifier output. Both the bandwidth and slew rate are thus significantly improved. Implemented in a 0.6m CMOS process, the propo...

A CMOS broadband amplifier with high-Q active inductor using 0.25um CMOS process is presented. In this broadband amplifier, the compact high-Q active inductor is connected to the common-gate configuration to improve the performance of the high power gain, wide bandwidth, low power consumption and simple matching characteristics. Not using any passive inductor components is to be reduced the are...

In this paper, a compact low-power (LP) low-voltage (LV) metal–oxide–semiconductor-only (MOS-only) variable gain amplifier (VGA) is introduced. This amplifier based on complementary MOS (CMOS) transistors operating in strong inversion is composed of a pseudo-exponential current-to-voltage converter, analog multiplier, and output stage. The gain of the amplifier is controlled exponentially by a ...

Rhodamine 6G and Rhodamine B dye mixture doped polymer optical fiber amplifier (POFA), which can operate in a broad wavelength region (60 nm), has been successfully fabricated and tested. Tunable operation of the amplifier over a broad wavelength region is achieved by mixing different ratios of the dyes. The dye doped POFA is pumped axially using 532 nm, 10 ns laser pulses from a frequency doub...

This paper describes the development of a very low-power pre-amplifier intended for use in pasteless-electrode recording of the human electrocardiogram. The expected input signal range is 100μV 10mV from a lead II electrode configuration. The amplifier provides a gain of 42dB in a 3dB bandwidth of 0.05Hz 2kHz with an input impedance of 280MΩ and a CMRR of greater than 80dB. Its gain and phase c...

An ultra-low voltage rail-to-rail operational trans conductance amplifier (OTA) based on a standard digital 0.18μm CMOS process is described in this paper. Techniques for designing a 0.6 volt fully differential OTA are discussed including bias and reference current generator circuit. To rail-to-rail operation complementary input differential pairs are used where Bulk driven technique is used to...