Classes and properties of multiloop negative-feedback amplifiers

Nordholt, E.H.

doi:10.1109/tcs.1981.1084973

Cited by 20 publications

(5 citation statements)

References 8 publications

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“…In such applications, both high linearity and low noise are required in order to obtain high dynamic range. Double-loop negative-feedback LNA topologies are often favored as they offer very good power matching over a wide bandwidth [1,2], low noise figure and high linearity [3,4]. The high linearity is obtained by ensuring a sufficient amount of loop gain and noise is minimized by choosing appropriate biasing current levels and putting multiple transistors (or multiple transistor fingers) in parallel.…”

Section: Introductionmentioning

confidence: 99%

A 1–2 GHz high linearity transformer-feedback power-to-current LNA

Serdijn

Woestenburg

et al. 2009

Analog Integr Circ Sig Process

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This paper demonstrates that a double-loop transformer-feedback power-to-current low noise amplifier, to be implemented in a 0.2 lm GaAs p-HEMT IC process, is able to obtain a noise figure less than 0.8 dB, an input return loss less than -12 dB, a flat voltage-to-current signal transfer of 180 mS, and an input-referred third-order intercept point (IIP3) of 1.8 dBm over a wideband frequency range from 1 to 2 GHz at a power consumption of 210 mW.

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Section: Introductionmentioning

confidence: 99%

A 1–2 GHz high linearity transformer-feedback power-to-current LNA

Serdijn

Woestenburg

et al. 2009

Analog Integr Circ Sig Process

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“…To achieve a broad bandwidth, a dual-loop negative feedback topology is favourable because of the possibility of accurately defining the input impedance [2]. This Letter presents a power-to-power (i.e.…”

mentioning

confidence: 99%

GaAs 0.5 dB NF dual-loop negative-feedback broadband low-noise amplifier IC

Woestenburg

Vaate

et al. 2005

Electron. Lett.

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“…In order to achieve a broad bandwidth, a dual-loop negative feedback topology is favorable because of the possibility to accurately define the input impedance [28]. This section presents a power-to-power (i.e.…”

Section: Dual-loop Negative-feedback Broadband Low-noise Amplifier Designmentioning

confidence: 99%

Ultra-Wideband Radio: Unconventional Circuit Solutions for Unconventional Communication

Bagga

Haddad

Serdijn

et al.

Analog Circuit Design

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The governing body in the United States, the Federal Communications Commission (FCC), has issued ultra-wideband regulations, under Part15 of the Commission's rules on April 22, 2002. Therefore, ultrawideband transmissions (intentional emissions) under certain frequency and power limitations have been permitted. The US has openly endorsed UWB based consumer products. Ultra-wideband offers significant contributions and advantages but simultaneously a number of challenges also need to be addressed. One of the key challenges is the co-design of an impulse generator and miniaturized antennas for ultra-wideband impulse radio. This has been designed and fabricated in 0.18µm CMOS technology. Measurements show the correct operation of the circuit for supply voltages of 1.8V and a power consumption of 45mW. The output pulse approximates a Gaussian monocycle having a pulse duration of about 375ps. Proper modulation of the pulse in time is confirmed [1]. In addition, to meet the stringent FCC stipulated frequency spectrum, an orthonormal [2] ladder filter with a Daubechies' impulse response is employed. The filter is implemented using novel 2-stage gm-C cells employing negative feedback. Simulation results in CMOS 0.13µm technology show that this pulse generator requires a total current of 30mA at a 1.2V power supply. The frequency coverage of the simulated waveform is about 85% of the FCC mask.In receivers, narrowband interference has been acknowledged as a serious impairment for UWB performance. Only limited research has been addressed to evaluate the effects on transmitted reference (TR) schemes. By employing "frequency wrapping", a new architecture, the Quadrature Downconversion Autocorrelation Receiver (QDAR) has been developed [3]. It does not suffer from timing and template matching problems, and it also circumvents processing at high frequencies, thereby reducing the on-chip circuit complexity and power consumption. Moreover, it not only offers narrowband interference rejection but also relaxes the timing accuracy of the delay circuitry in the auto-correlation function. For the QDAR, a quantized 255

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Classes and properties of multiloop negative-feedback amplifiers

Cited by 20 publications

References 8 publications

A 1–2 GHz high linearity transformer-feedback power-to-current LNA

A 1–2 GHz high linearity transformer-feedback power-to-current LNA

GaAs 0.5 dB NF dual-loop negative-feedback broadband low-noise amplifier IC

Ultra-Wideband Radio: Unconventional Circuit Solutions for Unconventional Communication

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