Highly Linear Bipolar Transconductor For Broadband High-Frequency Applications with Improved Input Voltage Swing

The topic of this article is the design of a fully balanced first-order high-pass filter and its two circuits. The first circuit is a fully balanced current-tunability first-order high-pass filter consisting of four NPN transistors and a single capacitor, which is a simple design and quite compact. The pole frequency can be adjusted with a bias current. The results of the first circuit shows the phase and gain responses, the phase and gain responses when adjusted with a bias current, the time-domain response, and the harmonic spectrum. However, this circuit found a flaw in the temperature that affects the pole frequency, and total harmonic distortion is relatively high. Therefore, the second circuit improves defects by the CAPRIO technique to reduce the total harmonic distortion, and the resistors in the circuit are added to the design to replace the resistance and the effect of temperature on the properties of the transistor. This circuit consists of four NPN transistors, four resistors, and a single capacitor. The resistors in this circuit can be adjusted to change the pole frequency and voltage gain. The results of the second circuit show the gain and phase responses of the proposed circuits, the phase and gain responses when adjusted to the value of the resistor, the phase and gain responses at various temperatures, as well as their time-domain responses and total harmonic signal distortion. The all-pass filter is also made using the filter introduced in the second circuit because of its voltage gain-adjustable property. So, if the suggested circuit is constructed in combination with a buffer circuit to make it feasible to function as an all-pass filter, the result will be an all-pass filter. In accordance with the results of this study, we have introduced a design for a high-pass filter to reduce total harmonic distortion and the effect of temperature

Section: Fig 2 the Fully Balanced First-order High-pass Filter Using ...mentioning

confidence: 99%

A fully balanced first order high-pass filter

Obma,

Jantakun,

Sa-ngiamvibool

et al. 2023

“…where these parameters A in , g m , R ee , f T are described in reference [18,25] IIP3. From ( 9) it is possible to rearrange the equation as shown in (10) where IM3 Cap = 1 is set:…”

Section: Caprio's Quad Of Volterra Series Analysismentioning

confidence: 99%

The development a fully-balanced current-tunable first-order low-pass filter with Caprio technique

Lertkonsarn

Sa-ngiamvibool

2022

This paper presents the development and design of a fully-balanced current-tunable first-order low-pass filter with Caprio technique, which could include the design and implementation of a first-order low-pass filter circuits. The filter consists of six bipolar junction transistor (BJT) and a single capacitor. The filter construction uses a bipolar junction transistor (BJT) as the main device and a single capacitor. A fully-balanced current-tunable first-order low-pass filter with Caprio technique developed. The architecture of the circuit is quite simple and proportional, symmetrical with signs of difference. Circuits developed into integrated circuits act like basic circuits for frequency filter circuits, current modes with Caprio techniques, obtained by improving the first-order low-pass filter for signal differences with incoming impedances. Adjusting the parameters of the circuit with the caprio technique achieves the optimal parameter value for correcting the total harmonic distortion value. The results of testing the operation of the circuit, a fully-balanced current-tunable first-order low-pass filter with Caprio technique developed and designed using the PSpice program. The simulation results showed good results in line with predicted theoretical analysis. The sensitivity of the device to the center frequency (ω0) response is low and independent of variables, the angular frequency is linear with wide current adjustment throughout the sweeping range of a wide frequency range, with a wide range of over tree orders of magnitude. Therefore, fully-balanced current-tunable first-order low-pass filter developed is very suitable to apply various applications regarding low frequency signal filtration, for example in biomedical systems, for example.

“…The relevance of the 10.7-MHz bandpass filter design is emphasized in [10], which presents a High-Q bandpass filter boasting an impressive 87 dB dynamic range at the same frequency. In the domain of bandpass filter designs, various current-controlled and balanced designs have been explored, as evident in [12][13][14]. In this evaluation, let's meticulously assess their performance, advantages, and drawbacks, offering a critical analysis of their potential applications.…”

Section: Introductionmentioning

confidence: 99%

“…However, each design presents its unique trade-offs. For instance, [12] enhances linearity and minimizes distortion but demands a complex design and may be sensitive to temperature variations. In contrast, [13] optimizes bandwidth and stability but may be more susceptible to component variations.…”

Section: Introductionmentioning

confidence: 99%

“…In a broader context, the paper primarily focuses on addressing the issue of odd-order noise in circuits, often attributed to gain and limited harmonic distortion [12,19]. To mitigate these challenges and achieve high linearity, harmonic distortion attenuation, and the elimination of even-order harmonics, the paper introduces a current-balanced, frequency-adjusted bandpass filter.…”

Section: Introductionmentioning

confidence: 99%

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The development of a 10.7-MHz fully balanced current-tunable bandpass filter with Caprio technique

Lertkonsarn,

Khwunnak,

Angkawisittpan

et al. 2023

Bandpass filters are integral in modern communication systems for selecting specific frequency ranges to ensure interference-free signal transmission and reception. This paper explores various bandpass filter designs, including those using active inductors, transmission-line unit-cells, microstrip open-loop resonators, and dual-port dual-frequency integration antennas. The focus is on the 10.7-MHz bandpass filter, widely used in FM radio and television systems. The study evaluates current-controlled and balanced designs, analyzing their performance, advantages, and drawbacks. Unique trade-offs in terms of linearity, distortion, temperature sensitivity, and component variations are discussed. Additionally, advancements in filter technology and diverse design options are presented. The paper introduces a novel current-balanced, frequency-adjusted bandpass filter to address odd-order noise issues. This filter aims to achieve high linearity, harmonic distortion attenuation, and the elimination of even-order harmonics. Through synthesis, analysis, simulation, and comparison with traditional filters, the proposed design enhances signal quality and efficiency. The fully-balanced current-tunable bandpass filter with the Caprio technique at 10.7 MHz is developed, exhibiting symmetrical characteristics with lower total harmonic distortion. The circuit’s structure is simple and adaptable for integration, validated through consistent simulation results. The study concludes by emphasizing the constant sensitivity of transistor differential amplifier circuits to the center frequency and the linear relationship between center frequency and adjustable bias current. The suggested transistor and capacitor selection criteria contribute to optimizing the circuit’s performance, aligning with the Caprio technique’s recommendations. Overall, this research presents a promising solution for achieving high-quality signal transmission in contemporary communication systems