QuickChip Design Example 2Low Power Silicon BJT LNA for 1.9GHz
The described Low Noise Amplifier (LNA) operates at a frequency of 1.9GHz, making it suitable for various wireless communication applications, such as mobile phones and satellite communications. The monolithic design indicates that the entire circuit is integrated onto a single silicon chip, which enhances performance by reducing parasitic capacitance and inductance associated with discrete components.
The total current draw of 1.75mA is particularly noteworthy as it signifies a low-power operation, which is essential for battery-powered devices. The inclusion of the bias circuit within this current specification ensures that the LNA maintains optimal performance across varying temperature and voltage conditions, thereby providing consistent gain and noise figure.
In terms of performance metrics, the LNA is expected to exhibit a low noise figure, which is crucial for amplifying weak signals without introducing significant additional noise. The device's gain, input and output impedance, and linearity should be characterized to ensure compatibility with subsequent stages in a receiver chain.
The circuit design may employ various techniques to achieve low power consumption while maintaining high performance, such as using cascode configurations, current steering, and optimized transistor sizing. Additionally, the integration of on-chip passive components can further minimize the overall footprint of the device, making it ideal for compact designs.
Overall, the 1.9GHz silicon LNA represents a significant advancement in low-power RF amplification technology, suitable for modern communication systems that demand both efficiency and high performance.Presented in this letter is a very low-power monolithic 1.9GHz silicon LNA which draws a total current of 1.75mA including bias circuit.. 🔗 External reference
Related Circuits
STMicroelectronics introduces the STV0288, its latest DVB and DIRECTV QPSK digital receiver, which adds blind scan capability and DiSEqC 2.0 to the industry-leading STV0299 and provides a cost reduction path for new products. The STV0288 is a sophisticated digital receiver...
Two inexpensive CMOS integrated circuits and a few transistors were sufficient to convert an old TTL automatic Morse keyer into a low-current, lightweight, battery-powered iambic Morse keyer. Over the last couple of years, the aging Accu-Keyer ceased functioning. This...
I have received a few emails asking for a transformerless power supply. Here is such a supply. This supply uses no heavy step down transformer and has an extremely low parts count. The circuit can be built very small...
This application note discusses the use of SEPIC power modules to supply the necessary power for driving high-brightness LED arrays. These arrays serve as display backlights and necessitate a wide dimming range. The SEPIC configuration offers an efficient and...
This power stabilizer circuit utilizes one relay to select either the high or low tap from the stabilizer transformer at a specific voltage level. The second relay maintains the normal mains voltage, but when a voltage fluctuation occurs, it...
This circuit utilizes a 74HC14 hex Schmitt trigger inverter as a square wave oscillator to drive a small signal transistor configured in a class C amplifier setup. The frequency of the oscillator can be either fixed using a crystal...