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CMOS RF front-end design for CMMB tuner

Author: ZhouChunZuo
Tutor: ZuoZuo
School: Fudan University
Course: Microelectronics and Solid State Electronics
Keywords: CMOS China Mobile Multimedia Broadcasting A low noise amplifier Mixer Programmable gain amplifier Noise figure Linearity AGC
CLC: TN943
Type: Master's thesis
Year: 2010
Downloads: 150
Quote: 0
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Abstract


Convenient wireless receiver and TV content, digital multimedia broadcasting in multiple parts of the world has been widespread concern. China Mobile Multimedia Broadcasting (China Mobile Multimedia Broadcasting, CMMB), digital multimedia broadcasting standard as in China, in 2006 by the State Administration of Radio Film and Television officially launched. The single-chip fully integrated CMMB tuner cost, is the best choice to receive CMMB signal. Discussed CMMB tuner receiver RF front-end is the single-chip solution is an important part. First, on a variety of popular receiver architectures are introduced and compared, and choose the zero-IF receiver architecture as a solution. This paper discusses in detail the system requirements of the receiver, and calculated according to the specific communication protocol requirements, noise and linearity requirements of the entire system and for each module. (Low Noise Amplifier, the LNA) and mixer are two most important module in the receiver RF front-end, low-noise amplifier. The detailed study of the low-noise amplifier design features such as input impedance matching and noise optimization. In order to be compatible with other similar standards, such as the European DVB-H, Korea T-DMB, or even include an FM radio, the receiver uses the low noise amplifier of the three parallel in order to cover the three different frequency bands, respectively. The three bands of 80 ~ 245MHz, 470 ~ 860MHz, 1.452 ~ 1.492GHz. Each low-noise amplifier has two gain mode to weigh noise and linearity specifications. In order to be able to receive the large dynamic range of input signals, to achieve high sensitivity of the system requirements, three RF programmable gain amplifier (Radio Frequency Programmable Gain Amplifier, RFPGA) is inserted between the low-noise amplifier and mixer. Since the output of the low noise amplifier is single-ended signal, and the differential signal on the sheet has a more excellent performance, so first stage RFPGA to achieve active balanced - unbalanced (BALANCED to Unbalanced balun) converter function. Second stage RFPGA using a multi-gate transistor structure (Multiple Gated Transistor, MGTR) structure in order to improve linearity. The third grade RFPGA to increase the accuracy of the gain step adjustment. The article also discusses the flicker noise of the mixer and linearity, the final choice of a passive mixer structure and its detailed analysis, design, and simulation results are given. In order to make the LNA and RFPGA gain dynamically adjustable, the receiver introduces energy detector of the RF reception signal (Radio Frequency Received Signal Strength Indicator, RFRSSI) circuit and a gain control loop stable mixer input signal energy. Above modules in Taiwan UMC (UMC) 0.18μm RF technology to design and manufacture a QFN40 package. In this paper, the simulation and verification results.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > TV > Transmission of television signals
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