Results 1 
7 of
7
A Versatile Building Block: The CMOS Differential Difference Amplifier
, 1987
"... An extension of the opamp concept featuring two differential inputs is presented. In a closedloop environment this circuit forces two floating voltages to the same value, and thus has many interesting applications in the analog circuit domain. The formal description of such a circuit, its nonideal ..."
Abstract

Cited by 9 (0 self)
 Add to MetaCart
An extension of the opamp concept featuring two differential inputs is presented. In a closedloop environment this circuit forces two floating voltages to the same value, and thus has many interesting applications in the analog circuit domain. The formal description of such a circuit, its nonidealities and restrictions are given. A monolithic integration of this differential difference amplifier (DDA) in a doublepoly CMOS technology and the measured characteristics are described. Many applications of this circuit, including a voltage comparator with floating inputs, a voltage inverter without resistors and an instrumentation ampli #er with only two external gain determining resistors are discussed.
The Implementation of a System Description Language and its Semantic Functions
, 1991
"... Contents 1 Introduction 9 1.1 Current system description languages . . . . . . . . . . . . . . . . . 9 1.2 Formal function theory . . . . . . . . . . . . . . . . . . . . . . . . . 10 1.3 Interpretation of formal functions . . . . . . . . . . . . . . . . . . . . 11 1.4 Semantic functions . . . . . . ..."
Abstract

Cited by 7 (6 self)
 Add to MetaCart
Contents 1 Introduction 9 1.1 Current system description languages . . . . . . . . . . . . . . . . . 9 1.2 Formal function theory . . . . . . . . . . . . . . . . . . . . . . . . . 10 1.3 Interpretation of formal functions . . . . . . . . . . . . . . . . . . . . 11 1.4 Semantic functions . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1.5 System semantics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 1.6 Adirectional systems . . . . . . . . . . . . . . . . . . . . . . . . . . 14 1.7 Applications of system semantics . . . . . . . . . . . . . . . . . . . . 14 1.8 The ESPRIT project FORFUN . . . . . . . . . . . . . . . . . . . . . 14 1.9 The contents of this thesis . . . . . . . . . . . . . . . . . . . . . . . . 16 2 Mathematical background 17 2.1 Overview of mathematical notation used . . . . . . . . . . . . . . . . 18 2.2 Formal function theory . . . . . . . . . . . . . . . . . . . . . . . . . 18 2.3 Formal language theory . . . . . . . . . . . . . . . . . . . . .
HF Low Noise Amplifiers with Integrated Transformer Feedback
 Proc. ISCAS 2002
, 2001
"... Matching networks are often used at the input of low noise amplifiers to match the input impedance to the source. Generally this matching results in a nonoptimal noise behavior. In addition the matching network itself often generates a significant amount of noise. This paper proposes a wideband LN ..."
Abstract

Cited by 1 (0 self)
 Add to MetaCart
Matching networks are often used at the input of low noise amplifiers to match the input impedance to the source. Generally this matching results in a nonoptimal noise behavior. In addition the matching network itself often generates a significant amount of noise. This paper proposes a wideband LNA, based on doubleloop negative feedback, that has an inherent matched input impedance. It offers the possibility to design and bias the input transisitor for maximum noise performance, and has the potential to increase linearity, without affecting the input impedance. An integrated HF transformer is used in one of the feedback loops and the effects of transformer nonidealities on noise behavior, input impedance and bandwidth are investigated.
A Design Strategy for the Synthesis of HighPerformance Instrumentation Amplifiers
, 1996
"... In this paper, the design strategy for a circuit synthesis program is described. Unlike other synthesis programs, the program searches in an extremely large set of possible circuits (over 1,000,000 possible circuit configurations), and is not restricted to one device technology. It uses ..."
Abstract

Cited by 1 (0 self)
 Add to MetaCart
In this paper, the design strategy for a circuit synthesis program is described. Unlike other synthesis programs, the program searches in an extremely large set of possible circuits (over 1,000,000 possible circuit configurations), and is not restricted to one device technology. It uses
Input Stages for Amplifiers Connected to VeryLow Or VeryHigh Impedance Signal Sources
, 1999
"... In this paper, the design of linear amplifiers for current sources with very low, or voltage sources with very high impedance is discussed. In designing negativefeedback amplifiers for these sources, the loopgain is often low as a result of the source impedance, thus making it di#cult to obtain a s ..."
Abstract
 Add to MetaCart
In this paper, the design of linear amplifiers for current sources with very low, or voltage sources with very high impedance is discussed. In designing negativefeedback amplifiers for these sources, the loopgain is often low as a result of the source impedance, thus making it di#cult to obtain a su#ciently high bandwidth. Here, it is proposed to use CB or CC stages in front of a negativefeedback amplifier. It turns out that the use of these stages does not have to have large detrimental e#ects on noise or distortion properties, while providing a good means to achieve a higher bandwidth. Moreover, the system becomes more robust to source parameter variations. Keywords linear amplifiers, bandwidth optimization, structured electronic design I. Introduction In this paper, the design of linear amplifiers for current sources with a low impedance or voltage sources with a high impedance is discussed. As an example, if a negativefeedback amplifier is to be designed for a very low imp...
Lowpower Adaptive Bipolar Low Noise Amplifier
, 2001
"... In this paper, a lowpower adaptive low noise amplifier (LNA) is presented. The LNA is based on a bipolar cascode topology, uses inductive source degeneration and emitter area scaling to achieve noise and inputimpedance matching simultaneously. The input impedance and the noise factor were simulate ..."
Abstract
 Add to MetaCart
In this paper, a lowpower adaptive low noise amplifier (LNA) is presented. The LNA is based on a bipolar cascode topology, uses inductive source degeneration and emitter area scaling to achieve noise and inputimpedance matching simultaneously. The input impedance and the noise factor were simulated as function of the bias collector current and the results show that both are approximately constant over a range of half a decade of bias current, gracefully degrade when the bias current decreases, thereby saving power.
by using the openloop gainpoles
"... A CAD application for optimising the bandwidth in the structured design of negativefeedback amplifiers ..."
Abstract
 Add to MetaCart
A CAD application for optimising the bandwidth in the structured design of negativefeedback amplifiers