Current-Mode, WCDMA Channel Filter With In-Band Noise Shaping

A 2.4-GHz ZigBee Receiver Exploiting an RF-to-BB-Current-Reuse Blixer + Hybrid Filter Topology in 65-nm CMOS

“…It implies i n,Mf1 can be leaked to the output via C f1 , penalizing the in-band noise. At even higher frequencies, the output noise decreases due to C f2 , being the same as its original form [14]. These results are expected due to the fact that at the FF corner, the noise contribution of the BB is less significant due to a larger bias current; while at the SS corner, the IF noise-shaping circuit will add more noise by itself, offsetting the NF improvement.…”

“…3.6a proposed in [14] [15,16]. The small-signal equivalent circuit to calculate the noise TF of i n,Mf1 /i n,out is shown in Fig.…”

Fundamentals of Modern RF Wireless Receivers: A Short Tutorial

“…On the contrary, at high frequency, the low impedance used to filter the input signal lets the noise coming out form the resistor. This intrinsic high-pass shaping of noise, and also of the distortions [4], makes the current more approach more suitable for the implementation of the channel selection filter.…”

A 54dB-DR 1-GHz-bandwidth continuous-time low-pass filter with in-band noise reduction

“…In these conditions, large power is expected for (low) resistive load driving, and Opamp input stage g m (for noise power reduction). The presented design approach proposes to use a single compact cell for an overall 5 th order transfer function, where in-band noise reduction is implemented [10]. Fig.…”