scholarly journals Influence of the reconstruction filter on the performance of a switched-mode power amplifier

2013 ◽  
Vol 26 (1) ◽  
pp. 1-10
Author(s):  
Elena Serebryakova ◽  
Kurt Blau ◽  
Matthias Hein
Keyword(s):  
Power Amplifier ◽  
Current Mode ◽  
Input Resistance ◽  
Mode Switching ◽  
Pass Band ◽  
Constant Input ◽  
Measurement Results ◽  
Reconstruction Filter ◽  
Experimental Approaches ◽  
Parasitic Components

This paper presents an analysis of a reconstruction filter in a switched mode power amplifier system. Doubly and singly terminated filters for current-mode class-S power amplifiers were analyzed previously through analytical, numerical, and experimental approaches, and it was shown that only singly terminated filters can fulfill the requirements of current-mode switching amplifiers, owing to their constant input resistance over the pass-band. In this paper potential effects of the parasitic components in the actual filters and the filter termination are evaluated. The simulation and measurement results of current mode class-S power amplifier systems employing GaN HEMT MMICs are presented and critically analyzed.

scholarly journals Optimization Technique for High-Gain CMOS Power Amplifier for 5G Applications

2021 ◽  
Vol 11 (24) ◽  
pp. 11691
Author(s):  
Hayeon Jeong ◽  
Huidong Lee ◽  
Bonghyuk Park ◽  
Seunghyun Jang ◽  
Sunwoo Kong ◽  
...  
Keyword(s):  
Power Amplifier ◽  
Optimization Technique ◽  
High Gain ◽  
Common Source ◽  
Power Added Efficiency ◽  
Power Cell ◽  
Measurement Results ◽  
Saturated Output Power ◽  
The Stability ◽  
Parasitic Components

In this study, a differential power amplifier (PA) with a high gain of over 30 dB by configuring a three-stage common source unit amplifier was designed. To ensure the stability of the high-gain differential PA, the analysis to apply the capacitive neutralization method to the differential common source PA was conducted. From the analysis, the required neutralized capacitance was quantitatively calculated from the estimated parasitic components of a power cell used in the PA. To verify the feasibility of the proposed optimization technique, a Ka-band PA was designed with a 65 nm RFCMOS process. The measurement results showed a gain of 30.7 dB. The saturated output power was measured as 16.1 dBm, maximum power-added efficiency (PAE) was 29.7%, and P1dB was 13.1 dBm.

scholarly journals Resistor-Less Single-Purpose or Reconfigurable Biquads Utilizing Single z-Copy Controlled-Gain Voltage Differencing Current Conveyor

2016 ◽  
Vol 26 (03) ◽  
pp. 1750050 ◽  
Author(s):  
Jan Jerabek ◽  
Roman Sotner ◽  
Josef Polak ◽  
Lukas Langhammer ◽  
Norbert Herencsar ◽  
...  
Keyword(s):  
Quality Factor ◽  
Current Mode ◽  
Input Resistance ◽  
Current Conveyor ◽  
Current Gain ◽  
Pass Band ◽  
Active Device ◽  
Current Input ◽  
Low Pass ◽  
Single Formula

Presented work deals with applications of the single [Formula: see text]-copy controlled-gain voltage differencing current conveyor (ZC-CG-VDCC) in single purpose and multifunctional biquadratic voltage- and current-mode active resistor-less filters. Electronically adjustable features of the active device (intrinsic current input resistance [Formula: see text], current gain [Formula: see text] and transconductance [Formula: see text]) are controlled by DC bias current. These mentioned adjustable features allow interesting possibilities of control of the pole frequency and quality factor. Four voltage-mode solutions realizing low-pass, band-pass, high-pass and band-reject filtering solutions were designed together with two current-mode filters. The current-mode solutions have curious multifunctional capability based on full utilization of electronically controllable parameters of the ZC-CG-VDCC. Two adjustable parameters of the ZC-CG-VDCC (intrinsic current input resistance and transconductance) are used for electronic setting of features of the filter (pole frequency, quality factor, tuning). Control of the third adjustable parameter (current gain) causes reconnection-less change of the transfer function between iAP (inverting all-pass response) and iBR (inverting band-reject responses). Simulation results in PSPICE and Cadence CDS 6 are used to show characteristics of the proposed circuits.

scholarly journals Miniaturisation of combline filters for switched-mode power amplifier systems

2008 ◽  
Vol 6 ◽  
pp. 125-127 ◽  
Author(s):  
E. Serebryakova ◽  
K. Blau ◽  
M. Hein
Keyword(s):  
Power Amplifier ◽  
Insertion Loss ◽  
Operating Frequency ◽  
Pass Band ◽  
Measurement Results

Abstract. This paper presents a coaxial combline filter for a class-S power amplifier for an operating frequency of 450 MHz. According to the measurement results, the filter provides a bandwidth of 26 MHz, an insertion loss of 0.55 dB, and a second pass-band only at 2.8 GHz. As the filter dimensions are crucial for the envisaged application, different ways to miniaturise the filter are proposed and their features and disadvantages discussed.

CURRENT-MODE ACTIVE-C FILTER EMPLOYING REDUCED NUMBER OF CCCII+s

2007 ◽  
Vol 16 (04) ◽  
pp. 507-516 ◽  
Author(s):  
SHAHRAM MINAEI ◽  
ERKAN YUCE
Keyword(s):  
Current Mode ◽  
Pass Band ◽  
Passive Component ◽  
Resistorless Filter ◽  
Low Pass ◽  
Component Matching ◽  
Band Pass ◽  
High Output Impedance ◽  
Quality Factor Q ◽  
High Pass

In this paper, a universal current-mode second-order active-C filter for simultaneously realizing low-pass, band-pass and high-pass responses is proposed. The presented filter employs only three plus-type second-generation current-controlled conveyors (CCCII+s). This filter needs no critical active and passive component matching conditions and no additional active and passive elements for realizing high output impedance low-pass, band-pass and high-pass characteristics. The angular resonance frequency (ω0) and quality factor (Q) of the proposed resistorless filter can be tuned electronically. To verify the theoretical analysis and to exhibit the performance of the proposed filter, it is simulated with SPICE program.

A New Tunable SISO Filter Designed in 40nm CMOS for Bilateral Inverse and Buffer Filtering Applications

2021 ◽  
pp. 2150240
Author(s):  
Umar Mohammad ◽  
Fang Tang ◽  
Shu Zhou ◽  
Mohd Yusuf Yasin
Keyword(s):  
Simulation Analysis ◽  
Pass Band ◽  
Single Input Single Output ◽  
Change Of Direction ◽  
Single Output ◽  
Low Pass ◽  
Single Input ◽  
Band Pass ◽  
Parasitic Components ◽  
High Pass

A new study imitating the design and implementation of single-input–single-output (SISO) filters as bilateral filters has been presented in this paper. Second generation current controlled current conveyor (CCCII), being a popular low power active element was considered for the realization of the proposed design. Complete design, analysis and implementation of the voltage mode SISO filter was done using only two CCCII’s and two passive parasitic components. The striking feature of this work is that the proposed design can be made to work at either the input node or the output node, as well as in the cases; the change of direction changes the filter into an inverse filter and buffer filter. Basic filter applications like low-pass, high-pass, band-pass and band-stop were aimed to check the uniformity of the proposed design at different frequencies. Results perceived from the simulation study were fare enough on both the side nodes of the proposed design. Categorically, the circuit can be aimed to work in lieu of a filter transceiver. The consistency of the circuit was analyzed by the nodal analysis. Whereas the working performance was enormously analyzed and evaluated during the simulation analysis. The proposed design was simulated in HSPICE tool to exhibit and exploit the delivery, using the 45[Formula: see text]nm predictive technology model (PTM) parameters, with [Formula: see text][Formula: see text]V rail to rail voltages. Maximum power consumption of the circuit is around 138.5[Formula: see text][Formula: see text]W. Finally, the design was also implemented in Cadence Virtuoso using 40[Formula: see text]nm SMIC parameters.

A 28-GHz Current-Mode Inverse-Outphasing Power Amplifier in 65-nm CMOS

2021 ◽  
Author(s):  
Liangfeng Li ◽  
Dongliang Ni ◽  
Jiazheng Chen ◽  
Jiwei Huang
Keyword(s):  
Power Amplifier ◽  
Current Mode

A 30-GHz CMOS SOI Outphasing Power Amplifier With Current Mode Combining for High Backoff Efficiency and Constant Envelope Operation

2020 ◽  
Vol 55 (5) ◽  
pp. 1411-1421 ◽  
Author(s):  
Kang Ning ◽  
Yihao Fang ◽  
Navid Hosseinzadeh ◽  
James F. Buckwalter
Keyword(s):  
Power Amplifier ◽  
Current Mode ◽  
Constant Envelope
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