Vendor: Zipcores Electronic Systems Engineering S.L. Category: Filters Transforms

Precision Tone Decoder

The TONE_DEC IP Core is a precision tone decoder with the ability to support either real or complex data samples.

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Overview

The TONE_DEC IP Core is a precision tone decoder with the ability to support either real or complex data samples. Samples are first mixed down to baseband before subsequent filtering and tone detection.

The centre frequency of the tone is fully programmable and is generated by a local oscillator (DDS). The DDS has an SFDR of better than 80 dBs (with phase dithering) and a theoretical SNR of approximately 100 dBs.

After down-conversion, the I and Q signal paths are filtered to remove components above the tone of interest. The characteristics of these filters may be changed depending on the desired detection bandwidth and response time.

Finally, a power function is used to compute the relative magnitude of the signal after filtering. If the complex input signal contains the tone of interest, then the relative output magnitude, mag_out, will be greater. The input threshold signal is a 32-bit unsigned integer that generates the tone_present flag when the magnitude is greater than this value. The threshold signal may be programmed in real time.

Key features

  • Synthesizable, technology independent soft IP Core for FPGA, SoC and ASIC
  • Supplied as human readable VHDL (or Verilog) RTL source code
  • 16-bit signed input and output data samples
  • Accepts either complex or real inputs
  • Precision Digital Down Converter with 80 dB SFDR
  • DDS Frequency resolution of FS / 232
  • DDS Phase resolution of 2π / 212
  • Programmable tone centre frequency and detection bandwidth
  • Choice of different low pass filter responses

Block Diagram

TONE_DEC block diagram

Applications

  • Touch tone decoding (e.g. DTMF tones)
  • Precision frequency monitoring and control
  • Security systems and remote control units
  • Complex digital down conversion
  • Basic building block in FSK / OOK / ASK demodulation

Files

Product Sheet Download

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Specifications

Identity

Part Number
TONE_DEC
Vendor
Zipcores Electronic Systems Engineering S.L.
Type
Silicon IP

Provider

Zipcores Electronic Systems Engineering S.L.
HQ: Spain
Zipcores design and sell IP Cores for implementation on all semiconductor devices. Founded in 2008, we are a team of experienced Engineers with a broad knowledge of digital hardware design spanning various fields. Our specific areas of expertise include Digital Video, DSP, Digital Modulation and high-speed interfaces. We offer a wide range of IP Cores for a variety of applications from basic building blocks to more complex systems. Our cores are supplied as clear readable VHDL or Verilog source-code and are synthesizable across multiple technologies - whether it be FPGA, ASIC or SoC.
Contact Zipcores Electronic Systems Engineering S.L.

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Frequently asked questions about Filters and Transforms IP cores

What is Precision Tone Decoder?

Precision Tone Decoder is a Filters Transforms IP core from Zipcores Electronic Systems Engineering S.L. listed on Semi IP Hub.

How should engineers evaluate this Filters Transforms?

Engineers should review the overview, key features, supported foundries and nodes, maturity, deliverables, and provider information before shortlisting this Filters Transforms IP.

Can this semiconductor IP be compared with similar products?

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