Design method for broadband CMOS RF LNA

Design of CMOS UWB LNA

“…Standard LC ladder filter input matching cell cannot address small fractional bandwidth such as 6-8.5 GHz ECC frequency band. These small fractional bandwidths can be addressed by using an input matching cell architecture using passive admittance inverters (Gaubert et al, 2005).…”

“…In the following sections we present a design method for these LC filter amplifiers based on our research works in this area published in (Gaubert et al, 2005), (Battista et al, 2008,a), (Battista et al, 2008,b) and (Battista et al, 2010).…”

“…Such fractional bandwidths lead to large inductor values with self frequency resonance (SFR) lower than the operating LNA frequencies in traditional LC filter LNA architecture. By using admittance inverters, broadband LC filter input matching cell for small fractional bandwidths can be implemented in standard CMOS technologies (Gaubert et al, 2005). Such input matching cells are obtained from the band-pass filter using admittance inverters shown in Fig.…”

Design and implementation of UWB CMOS LC filters LNA for carrier less impulse radio receivers

“…The traditional LC filter LNA architecture proposed in [9] cannot be used for fractional bandwidth lower than about 50%, and consequently the frequency bands allowed in Europe or Japan cannot be addressed with the traditional architecture. In [10] we proposed a LC filter LNA for fractional bandwidths around 25% useful for the 6-8.5 GHz ECC frequency band. In [11] and [12] we proposed design methods with associated architectures which allow low noise figure and high voltage gain for LC filter LNA with large and low fractional bandwidth, respectively.…”

Design method for CMOS wide-band low noise amplifier for mobile TV application

“…Since the LNA can be directly added to the first stage in the receive path, it usually dominates the NF and bandwidth in the receiver, and a variable gain LNA can improve the dynamic range of the whole receiver. In addition, the traditional wide-band LNA technology is always designed based on inductors and capacitors for wide-band matching with larger size and higher cost [2,3]. Based on the foregoing consideration, we design a LNA which can achieve the requirements of low noise figure, gain control mode, wider bandwidth, and less power consumption by switching different modes.…”