Simple and symmetrical ultra low-voltage current mode analog circuits and autozeroing amplifiers are presented. The low-voltage analog circuits are based on low-voltage inverters resembling precharge digital logic. Ultra low-voltage analog circuits can be operated at supply voltages down to 250 mV with rail-to-rail input and output swing. The output current of the ultra low-voltage symmetrical ...

A low dropout voltage regulator with small output voltage variations and the ability of wide load current range support is proposed in this paper. In this LDO structure, a recycling folded cascode operational transconductance amplifier is used as an error amplifier, which has high transconductance and therefore high power efficiency. The designed LDO is simulated in 0.18 μm CMOS standard techno...

— The paper considers some basic problems in the design of tunable fully differential gyrator resonance circuit. First is presented briefly the theory of the parallel gyrator tank with emphasizing on the effects from the amplifier imperfections. Then is considered the design of a single stage operational transconductance amplifier (OTA) with source degeneration for better linearity. It is demon...

A novel method that reveals the spatial distribution of border traps in III-V MOSFETs is presented. The increase in transconductance with frequency is explored in a very wide frequency range (1Hz to 70 GHz) and a distributed RC network is used to model the oxide and trap capacitances. An evaluation of vertical InAs nanowire MOSFETs and surface-channel InGaAs MOSFETs with Al2O3/HfO2 high-κ gate ...

This paper describes the realization of the voltage-to-current converter (V/I) with electronically and linearly current tunable. The developed element is realized based on the use of transconductance cells (Gms) as core circuits. The advantage of this element is that its transconductance gain can be tuned electronically and linearly by adjusting external DC bias currents. The circuit is designe...

This paper presents a design methodology for common-mode (CM) stability of operational transconductance amplifier (OTA)-based gyrators. The topology of gm − C active inductors is briefly reviewed. Subsequently, a comprehensive mathematical analysis on the CM stability of OTA-based gyrators is presented. Sufficient requirements for the gyrator’s CM stability, that easily can be considered during...

This paper presents a compact current-mode three-input single-output (TISO) type universal filter. Only one voltage differencing transconductance amplifier (VDTA) and two grounded capacitors are employed in the proposed filter. The circuit can realize lowpass, bandpass, highpass, bandstop and allpass biquadratic filter outputs by connecting the appropriate inputs, and offers electronic control ...

A CMOS quadrature down-converter for a direct-conversion receiver of 5.15-5.825GHz wireless LAN is described. The down-converter consists of two sub-harmonic mixers, for I and Q channels, and an LO generation network. In order to prevent the low-frequency component generated by the even-order distortion of the transconductance stage from being leaked to the mixer output, transconductance and sw...

Performance of n-type implant free In0.25Ga0.75As MOSFETs with Ga2O3 dielectric is investigated using ensemble Monte Carlo device simulations. The implant free MOSFET concept takes an advantage of the high mobility in III-V materials to allow operation at very high speed and low power. A 100 nm gate length implant free In0.25Ga0.75As MOSFET with a layer structure derived from heterojunction tra...

A CMOS o p a m p input and gain stage suitable for low voltage operation are introduced. The input stage operates in strong inversion and has common-mode range beyond rail-to-rail. It uses two complementary differential pairs connected in parallel. The common-mode dependent current biasing employs only four transistors, does not require additional voltage references, current switches and/or cur...