參數(shù)資料
型號(hào): AT76C001
廠商: Atmel Corp.
英文描述: CBIC Programmable FIR Filter
中文描述: CBIC可編程FIR濾波器
文件頁(yè)數(shù): 1/9頁(yè)
文件大小: 73K
代理商: AT76C001
AT76C001
CBIC
Programmable
FIR Filter
AT76C001
Features
4 Multiplier-Accumulators
40 Bits Accuracy
16 Bit Data and Coefficients
4-tap Filter With 27 MHz Sample Rate
Programmable to Give up to 256 Taps With Sampling
Reducing Proportionally to 421,875 kHz
Programmable Rounding and Truncation to 16 Bit
8 Bit Standard Microprocessor Interface
64-pin PQFP, 68-pin PGA68 or 68-pin LCC68 Packaging
Description
The AT76C001 Programmable Finite Impulse Response (FIR) Filter implements a
4th order FIR cell built around 4 multiplier-accumulators. It contains a dual-port
RAM and a RAM which are used to implement FIR filters of up to 256 taps. High or-
der filters are achieved by multiplexing the 4th order cell and accumulating the inter-
mediate results up to 40 bits, so that there is no loss of accuracy.
The maximum frequency of the AT76C001 is 27 MHz. For 4-tap FIR filter, the in-
coming sample rate can be as high as 27 MHz. For higher order FIR filters, the
sample rate can be as high as the circuit frequency divided by the 4th order cell mul-
tiplexing factor.
A programmable normalization block allows the choice of the 16 significant bits from
the 40 bit internal result which can be previously rounded by adding 0.5 LSB accord-
ing to the 16 significant bit locations. The AT76C001 has a microprocessor inter-
face which can be configured to be Intel or Motorola compatible.
Applications
Digital Filters (video, audio, etc.)
Correlation
Image Processing
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