Highly linear SiGe BiCMOS LNA and mixer for cellular CDMA/AMPS applications

Aparin, V.; Zeisel, E.; Gazzerro, P.

doi:10.1109/rfic.2002.1011939

Cited by 22 publications

(11 citation statements)

References 7 publications

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“…Even though both LNA designs include two different gain modes, they are competitive compared to recently published LNAs [6], [9]- [10]. He is author or co-author over two hundred international and national conference and journal publications on analog integrated circuits.…”

Section: Resultsmentioning

confidence: 99%

“…In this design, the value of the degeneration inductance is 1.5 nH in HG core for low NF and a larger 3.5-nH inductance is selected for the LG core to reduce gain and to improve linearity. In addition, the LNA core in LG mode is biased by using an external inductance in order to improve linearity [6]. In this design, the base inductors are implemented using bond wires.…”

Section: Dual Input Lnamentioning

confidence: 99%

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Low-noise amplifiers for WCDMA base-station receivers

Tikka¹,

Ryynänen²,

Halonen³

2007

Analog Integr Circ Sig Process

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This paper focuses on the design and measurements of low-noise amplifiers (LNA) targeted for WCDMA base-station applications. In addition, various gain control techniques and the accuracy in noise measurements have been analyzed. Two different LNA designs are presented. Both LNAs can be operated in two gain modes, which are optimized for different base-station configurations. Both designs are implemented using the same 0.25-lm SiGe BiCMOS process, and both designs achieve the NF of 1 dB and IIP3 of -5 dBm in high gain mode.

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Section: Resultsmentioning

confidence: 99%

Section: Dual Input Lnamentioning

confidence: 99%

Low-noise amplifiers for WCDMA base-station receivers

Tikka¹,

Ryynänen²,

Halonen³

2007

Analog Integr Circ Sig Process

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“…In Eqn (4.42), the product (A 2 þ B 2 )Ggcos(u m t) is of great interest. 5 When fed through the mixer, as shown in Figure 4.8, the term appears at baseband in the desired signal band as distortion. This demodulation of AM components serves to further corrupt the received signal.…”

Section: Degradation Effects Due To Second Order Nonlinearitymentioning

confidence: 99%

System Nonlinearity

Rouphael¹

2014

Wireless Receiver Architectures and Design

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“…The load impedance is not taken into account in the analysis, which is a fair assumption since the LNA stage is unilateral. To calculate the optimum out-of-band source terminations of this network, we use the expressions for IM3 as defined in [5], which state that the magnitude of IM3 is proportional to a factor , given by (16) where and , which is valid for small . The Taylor coefficients of the nonlinear collector current up to the third-order are defined as (17) The first term in is responsible for the direct third-order nonlinearity and the second term describes how the second-order nonlinearity mixes with the fundamental signal again, producing an indirect third-order nonlinearity.…”

Section: A Nonlinear Analysismentioning

confidence: 99%

“…We can achieve cancellation of the direct and indirect third-order nonlinearity by finding the proper baseband and second-harmonic source impedances and , which make . Note that in this analysis , since the impedance of is negligible for small , and therefore, can be approximated by (19) In this way, can be solved by setting in (16) and by substituting the Taylor coefficients and given in (17) and (19), respectively:…”

Section: A Nonlinear Analysismentioning

confidence: 99%

On the design of unilateral dual-loop feedback low-noise amplifiers with simultaneous noise, impedance, and IIP3 match

Heijden

Vreede

Burghartz

2004

IEEE J. Solid-State Circuits

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Abstract-This work describes the theory and design of a nonenergetic dual-loop feedback low-noise amplifier (LNA) that provides maximum unilateral gain and simultaneous noise and impedance matching conditions. The dual-loop feedback is implemented in the form of transformer current-feedback and inductive series feedback (emitter degeneration). The current-feedback transformer is also used to neutralize the base-collector capacitance ( ), by combining it with a properly dimensioned shunt admittance at the collector output. The result is a single-transistor unilateral-gain amplifier with high isolation and good stability, eliminating the need for a cascode stage and thus enabeling the use of a lower dc-supply voltage. For the complete LNA, simple design equations are derived for the unilateralization, noise, and impedance matching requirements. Finally, second-harmonic tuning at the source improves the linearity without compromising the simultaneous noise and impedance match. To verify the presented theory, a 900-MHz hybrid Si BJT LNA has been implemented, which achieves 1.3-dB noise figure, 15-dB gain, 55 dB isolation, and +10 dBm IIP3 using a conventional double poly transistor, consuming = 2 5 mA at = 1 5 V.Index Terms-Linearity, low noise amplifier (LNA), negative feedback amplifier, noise matching, radio-frequency integrated circuit design, Si-SiGe analog circuit design, third-order distortion, third-order intermodulation distortion (IM3).

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Highly linear SiGe BiCMOS LNA and mixer for cellular CDMA/AMPS applications

Cited by 22 publications

References 7 publications

Low-noise amplifiers for WCDMA base-station receivers

Low-noise amplifiers for WCDMA base-station receivers

System Nonlinearity

On the design of unilateral dual-loop feedback low-noise amplifiers with simultaneous noise, impedance, and IIP3 match

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