The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents a 60-GHz CMOS power amplifier (PA) with efficiency enhancement at power back-off. To boost the amplifier performance at millimeter-wave (mm Wave) frequencies, the neutralized amplifier stage is optimized with input transformer. Furthermore, the power combining techniques are used to enlarge the output power and enhance the efficiency at power back-off as well. The transformer-based...
This paper presents a five-stage wideband digital controlled variable gain amplifier (DVGA). A bandwidth extended technique is proposed in this design to enhance gain flatness and enlarge gain range in high operating frequency. DC offset cancellation in this design helps to enhance the performance of proposed DVGA. The design is simulated using a commercial 0.18µm SiGe BiCMOS technology. The DVGA...
This paper presents a novel inductorless transimpedance amplifier (TIA) design using Global Foundaries 0.18-µm CMOS technology suitable for high speed optical communication. A modified-RGC preamplifier stage (M-RGC) is used to lower input impedance through cascode and parallel PMOS transistor techniques for wideband operation. The amplifier stage used common source amplifiers to increase the gain...
This paper presents low insertion loss, high isolation, ultra wideband (DC to 50 GHz) 2 × 2 switch matrix in a 300mm 0.13 µ m high substrate resistivity trap-rich SOI. The switches are designed by using a series-shunt-series configuration with input and output matching networks. The designed switches achieve a 1.8 dB of low insertion loss and a high isolation of 38 dB up to 50 GHz. 1dB-compression...
In this paper a novel method to design a transformer based balun with isolation between output ports and matching characteristic at all ports is proposed. The main issue of transformer balun at millimeter-wave frequencies is that it has poor matching and isolation performance. In this work, an isolation circuit is introduced to place between output ports in the transformer balun design. As a validation,...
This paper presents recent design techniques and performance tradeoffs for wideband variable gain amplifiers (VGA). A VGA design with reduced bandwidth variation over the entire gain control range is proposed and the incorporating design techniques are explained along with good simulation performance. The proposed five-stage VGA is designed in a commercial 0.18µm SiGe BiCMOS technology achieving a...
A 60-GHz switchless bi-directional variable gain amplifier (BDVGA) is presented in this paper. The proposed RF signal flow direction and amplifier gain reconfigurable design is implemented by using micro-strip line (MSL) structure as interconnects between two back-to-back connected identical amplifiers and the transistor bias voltage control. Hence, the proposed 2-port bi-directional amplifier avoids...
The paper presents a broadband low noise amplifier emphasizing on stability improvement by layout techniques. The proposed LNA achieves a gain of 13.7 dB, a 3-dB bandwidth of 47.6 GHz to 67.1 GHz and a dc current consumption of 23 mA from a 1.2 V supply voltage. This work delivers +5.8 dBm and +9.6 dBm saturated output power with 10.3% and 16% peak PAE under a supply voltage of 1.2 V and 2.1 V, respectively,...
This paper presents a low power gain programmable high power efficient K-/Ka-band differential amplifier with current reuse topology. The amplifier achieves a best peak power added efficiency of 55.9% at the saturated power of +11.1 dBm and a variable gain from 1.8 dB to 16 dB with a 3-dB bandwidth from 21.8 GHz to 32.1 GHz. The design is fabricated in a commercial 0.18-µm SiGe BiCMOS process with...
This paper presents the proposed silicon proven design techniques and the performance tradeoffs in the generic digitally variable gain amplifier (DVGA) designs. Two example designs were fabricated in a SiGe BiCMOS technology incorporating these design techniques and measured with good performance. Both the proposed designs, with low power consumption and compact size, are adapted in RF chipset with...
A 6-bit programmable gain amplifier (PGA) with current mode exponential gain control is presented in this paper that achieves a linearity error within ±0.1 dB over a 30-dB wide gain control range. The proposed design topology has two digitally-variable gain amplifiers and a post amplifier that are interconnected by a differential pair wideband matching network to provide an enhanced gain bandwidth...
This paper presents a high performance wideband amplifier and justifies the performance with the aid of measurement results. The amplifier consumes very low power about 6.8mW from a supply voltage of 1.8V. The amplifier is designed using a cross coupled cascode topology to improve the Gain and Bandwidth. The design is implemented in a 0.18μm SiGe BiCMOS process (ft = 200GHz) with 9.3dB small signal...
A fully integrated fundamental and push-push voltage controlled oscillators (VCOs) working in K-band with a large tuning range and a low phase noise fabricated in a 0.18 µm SiGe BiCMOS technology is presented. To achieve a wide tuning range while maintaining a low VCO tuning sensitivity (Kvco), the coupled LC tanks and digital tuning capacitors are used. The VCOs achieve a frequency tuning range (FTR)...
A fully integrated voltage-controlled oscillator (VCO) working in K-band with a large tuning range and a low phase noise fabricated in a 0.18 µm SiGe BiCMOS technology is presented. To achieve a wide tuning range while keeping a low VCO tuning sensitivity (KVCO), the coupled LC tanks are used. The VCO achieves figures of merit (FOMs) greater than −180 dBc/Hz for both phase noise and tuning range with...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.