A Highly Desensitized, Wide-Band Monolithic Amplifier

Solomon, J.; Wilson, George R.

doi:10.1109/jssc.1966.1049751

Cited by 23 publications

(2 citation statements)

References 6 publications

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“…This claim is generally true for first-order amplifiers disregarding second-order effects caused by the feedback network, or even the presence of more poles. It is common practice to disregard time delays that may appear in the feedback path, although these are commonly associated with excess phase elements [1][2][3][4] that may promote instability. However, it is possible to exploit these delays to increase system bandwidth above the value predicted by the traditional GBW product, while maintaining stability.…”

Section: Introductionmentioning

confidence: 99%

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A time‐delay technique to improve GBW on negative feedback amplifiers

Alves

Aguiar

2007

Circuit Theory & Apps

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SUMMARYThis paper presents a new method to improve the GBW (gain-bandwidth product) on negative feedback amplifiers. The proposed method is based on the introduction of time-delay elements in the feedback loop, which can be exploited to retrieve significant bandwidth enhancements. This delayed feedback concept is analyzed, and considerations are presented for first-order amplifiers, based on theoretical analysis. The concept is simulated and further demonstrated in a practical example using a series-shunt feedback amplifier with a TL081 operational amplifier (OA) and a 36-m-long coaxial cable as a delay element. Measured experimental results show a maximum bandwidth improvement of almost 90%, from a theoretical maximum of 141%.

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Section: Introductionmentioning

confidence: 99%

“…Early feedback amplifier design techniques included these delay terms into the analysis procedure, since delays could lead to instability [1,3,4]. Due to the physical apparatus of the early valve amplifiers these delays could impair the amplifier stability [1].…”

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confidence: 99%

A time‐delay technique to improve GBW on negative feedback amplifiers

Alves

Aguiar

2007

Circuit Theory & Apps

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Sanz

Celma

Calvo

2008

Circuit Theory & Apps

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A DC-to-2.3-GHz Amplifier Using an “Embedding” Scheme

White¹,

Chin²

1973

Bell System Technical Journal

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A novel circuit technique is described for embedding a high‐frequency amplifier in a low‐frequency circuit to achieve a defined, flat gain from dc to the cutoff frequency of the hf amplifier. The technique provides this low‐frequency gain without compromising the hf design optimization. An embodiment of this technique is described which has provided, experimentally, amplifier gain from dc to a half‐power point of 2.3 GHz.

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A Highly Desensitized, Wide-Band Monolithic Amplifier

Cited by 23 publications

References 6 publications

A time‐delay technique to improve GBW on negative feedback amplifiers

A time‐delay technique to improve GBW on negative feedback amplifiers

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A DC-to-2.3-GHz Amplifier Using an “Embedding” Scheme

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