Chua-Chin Wang

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We present a novel implementation for 2K/8K dual-mode FFT (fast Fourier transform) for OFDM (orthogonal frequency division multiplexing) of DVB-T (Digital Video Broadcasting Terrestrial) receivers. Besides pipelining the FFT to reduce the area and enhance the data throughput, SDF (single-path delay feedback) butterfly units for radix-2 and radix-4(More)
This brief presents an all-digital frequency synthesizer based on the flying adder (FA) architecture. The FA is a fascinating architecture for frequency synthesizer designs due to its simplicity and effectiveness. The FA-based frequency synthesizer can simply use a set of multiple phase reference signals to generate a desired frequency to achieve fast(More)
An exponential bidirectional associative memory (eBAM) using an exponential encoding scheme is discussed. It has a higher capacity for pattern pair storage than conventional BAMs. A new energy function is defined. The associative memory takes advantage of the exponential nonlinearity in the evolution equations such that the signal-to-noise ratio (SNR) is(More)
The exponential bidirectional associative memory (eBAM) has been proposed and proved to be a stable and high capacity associative neural network. However, the intrinsic structure and the evolution functions of this network restrict the representation of patterns to be either bipolar or binary vectors. We consider the promising development of multi-valued(More)
This paper presents an architecture as well as circuit implementation of a ZigBee modulator/demodulator in the transceiver for personal area network, which is compliant with the physical layer of IEEE standard 802.15.4. A test prototype has been designed and fabricated using 0.18m single-poly six-metal CMOS process with core area of 0.16 mm . The(More)