This paper presents the realization of a linear polar transmitter supporting multistandard applications. The harmonic-tuned class-AB biased (class-AB/F) power amplifier (PA) with novel envelope shaping method linearly amplifies input signal high efficiency. hybrid switching supply modulator programmable hysteretic comparator enables multimode operation whatever characteristics such as peak-to-average ratio and bandwidth are. designed is fabricated CMOS 0.13-mum technology InGaP/GaAs 2-mum...

This paper describes the analysis of an optimized envelope shaping function for tracking power amplifier (ET PA) and its implementation. The proposed function, which is sweet spot with crest factor reduction, improves efficiency output (PA), as well linearity. For accurate simulation supply modulator, equivalent model PA under suggested. To achieve high wide bandwidth, CMOS modulator has a hybrid structure switching linear amplifier. fabricated ET delivers higher better linearity than...

A quarter-wavelength impedance transformer as well a number of other factors limit the bandwidth (BW) Doherty power amplifiers (PAs). We utilize lower Q quarter-wave length and propose phase compensation circuit an additional offset line to be incorporated into matching net works for enhanced BW PA. The final output have same Q. Input dividing networks are also analyzed operation broad BW. PA long term evolution (LTE) applications is integrated 1.4 × mm <sup...

As mobile communication systems evolve to handle higher data rates, their modulation schemes only become more complicated, generating signals with large bandwidth and high peak-to-average-power ratio (PAPR). To amplify such efficiency, the power amplifier (PA) should have efficiency not at peak level but also low power, especially over maximum generation region. realize these PA characteristics, drain bias voltage of transistor can be modulated on basis input envelope minimize dc supply...

An envelope-tracking (ET) CMOS power amplifier (PA) is fabricated using a 0.18- μm process. The module containing the supply modulator, PA, and output transformer implemented on printed circuit board (PCB). PA employs second third harmonic controls at input short for improved linearity. impact nonlinearity of cascode differential structure studied optimized. A proposed PCB minimizes loss enhances efficiency PA. ET gate common transistor to achieve high linearity without digital...

In this paper, we proposed and designed a digitally configured versatile RF quadrature transmitter. The transmitter efficiency was enhanced by IQ cell sharing the deactivation of cells opposite phases. simulation, these techniques were able to increase average from 46.3% 70.7% for 6.9-dB PAPR LTE signal. Moreover, number power amplifying halved, improving total implemented in 6-b configuration at 0.8 GHz using 28-nm CMOS process. Furthermore, performance verified. dynamic range measured...

This paper demonstrates a new polar transmitter architecture, which uses the digitized envelope signal to control drain voltage of switching mode power amplifier (PA). It is based on novel modulation using constant modulated signal. Among various modulators, DeltaSigma modulator chosen for its noise-shaping characteristic. enables use highly efficient with high linearity. For demonstration, overall implemented and tested code-division multiple-access IS-95A The class-D class-F amplifiers are...

A multimode/multiband power amplifier (PA) with a boosted supply modulator is developed for handset applications. linear broadband class-F designed to have constant fundamental impedance across 1.7-2 GHz and its second third harmonic impedances are located at the high-efficiency area. To reduce circuit size application, control circuits merged into output matching frequency. An envelope-tracking operation delivers high efficiency overall power. The linearity improved by envelope tracking...

This paper presents an optimized envelope tracking (ET) operation of a Doherty amplifier. Compared to the general ET/envelope elimination and restoration transmitter, it has advantage extended dynamic range 6 dB for load modulation Moreover, by modulating supply voltage carrier amplifier, while that peaking amplifier is fixed, modulator provides just half current same power output power. It results in reduced chip size crest factor signal dB, enhancing efficiency modulator. The designed ET...

This paper presents an envelope tracking power amplifier (ET PA) using a dual-mode supply modulator for handset application. The has combined structure with linear and switching amplifier. operates in high-power mode low-power by providing the voltage of 5 2.5 V, respectively. For 1.74-GHz long-term evolution signal 10-MHz bandwidth, 6.44-dB peak-to-average ratio, 16-quadrature amplitude modulation, ET PA delivers power-added efficiency (PAE) 39.8%, evolved universal terrestrial radio access...

A new supply modulator architecture for robust performance against the battery voltage variation is presented. The resulting an optimized power management integrated circuit (PMIC) envelope tracking (ET) amplifier (PA). basic topology of PMIC based on a hybrid switching combining wideband class-AB buffered linear and highly efficient switching-mode buck converter in master-slave configuration. additional boost regulates amplifier, while directly coupled to battery. proposed achieves max/min...

In this letter, we present a label-typed UHF RFID tag antenna for metallic objects. The is fabricated on thin flexible PET substrate with thickness of 0.07 mm. order to achieve good performance objects as well in free space, the design proposed mainly considered two factors; gain and impedance matching. To increase antenna, place an additional loop, which has line width 2.5 mm surrounds original meandered folded dipole antenna. Also, achieved by matching frequency region where minimum...

Previous compute‐in‐memory (CIM) technologies use current summation for executing matrix–vector multiplication (MVM) operations and are gaining attention as next‐generation artificial intelligence (AI) computing systems. Despite their advantages, these encounter significant difficulties, such managing wide ranges in large arrays, overcoming substantial “IR (current‐resistance)‐drop” issues, integrating with complementary metal–oxide–semiconductor operating circuits. Herein, an innovative...

The class-AB/F power amplifier (PA), a multimode PA, which can operate at both class-AB and class-F modes, is analyzed compared with the conventional PAs. open-circuited third harmonic control circuit enhances efficiency of PA without deteriorating linearity mode PA. voltage current waveforms are simulated to evaluate appropriate operation for modes. To demonstrate implemented using an InGaP/GaAs HBT process it tested reverse-link IS-95A code division multiple access (CDMA) PCS1900 global...

In this paper, we analyze the power drive of a Doherty amplifier (PA), and introduce technique for proper input dividing without coupler. For operation, place phase compensation circuit at carrier amplifier. We also propose an output matching PA to reduce number components, match impedances enhance efficiency linearity in consideration uneven drive. The is fabricated using 2-μm InGaP/GaAs heterojunction bipolar transistor process combined operation merged lumped components. IEEE 802.16e...

In this letter, the application of a variable characteristic impedance transmission line that can be used to design dual-band bandpass filter (BPF) is presented. The proposed offers fixed first passband and controllable second passband. tuning achieved by varying shunt open stub loaded resonator (SLR) with help defected ground structure (DGS) varactor diodes. order validate theoretical predictions simulated results, two stage BPF three zeros was implemented experimentally verified.

This paper presents a dual power-mode and multi-band power amplifier (PA) for handset applications that improves the efficiency in low-power regions. PA operates two modes through path control by shunt switched capacitor. The proposed method provides efficient mode without any degrading bandwidth (BW) limiting. PA, conjunction with boosted supply modulator envelope tracking (ET) operation not only high-power mode, but also delivers good performance at all average output levels. linearity is...

A differential cascode CMOS power amplifier (PA) with a supply modulator for envelope tracking (ET) has been implemented using 0.18-μm RF technology. For maximizing the PA's performance, cell optimized. The PA employs 2nd harmonic control circuits at input, source, and output of to improve efficiency linearity same time. utilizes an improved ET modulator, which is suitable high knee voltage. By utilizing this we achieve not only higher linearity, but also in all levels. long-term evolution...