A 184mW Fully Integrated DVB-H Tuner Chip with Distortion Compensated Variable Gain LNA

Abstract

A single chip direct conversion DVB-H tuner with a distortion compensated variable gain LNA is implemented in 0.5µm SiGe BiCMOS. The LNA exhibits 0dBm IIP3 and 2.8dB NF at 860MHz. A new offset cancel feedback is introduced that keeps the cutoff frequency independent of the baseband gain. The IC consumes 184mW at 2.8V while achieving a sensitivity of -96dBm for QPSK, CR=1/2 signal.

Rupture Processes in Fibre Bundle Models

“…It has, therefore, a strong potential as a useful detection tool. It is interesting that most recently, Kawamura [14] has observed a decrease in exponent value of the local magnitude distribution of earthquakes as the mainshock is approached (See Fig. 20 of Ref.…”

Integrated RF-ICs for Mobile TV Applications

“…Furthermore, we tested the chipset performance using captured data provided by D-Pa (The Association for Promotion of Digital Broadcasting) at the locations: (1) Metropolitan Expressway (moving), (2) the urban area covered with SFN (Single Frequency Network, stationary). In these conditions, the adaptive control did not deteriorate the reception rates at all while reducing power consumption by 22.6mW for (1) and 15.6mW for (2).…”

“…11. The linearization technique described in [2], [3], which compensates the gain compression for large input signal, contributes to this improvement.…”

“…On contrary, in European standard, the mobile version called DVB-H (DVB Handheld) uses time divided transmission called "time slicing", where each burst transmission is followed by longer off period (Fig. 2) [2], [3]. ISDB-Tss and DVB-H are the emerging standards for transmission of multimedia content to portable terminals and their commercial services have already launched in various countries in 2006 and the cell phones that can receive those services are commercially available.…”

RF Variable-Gain Amplifiers and AGC Loops for Digital TV Receivers

“…The circuit is simpler and more power-efficient than that proposed in [6], which needs many current sources and sinks. Assume that the transfer function of the commonemitter stage is expressed as a(x + ux 3 ). If the IIP3 voltage x 0 of the common-emitter stage is independent of the bias current, then the IIP3 voltage of the combined amplifier can be written as cx 0 where c is obtained from the combined output function in Fig.…”