Summary of FM radio using TEA5767 and PIC16F877A micro-controller
The TEA5767 is a single-chip FM stereo radio IC featuring high sensitivity, integrated RF amplification, and internal IF selectivity. It supports US/Europe and Japanese FM bands with preset tuning for TV audio. Key features include an LC tuner oscillator, crystal reference frequency options (32.768 kHz or 13 MHz), and a PLL synthesizer. The chip offers I2C/3-wire bus control, soft mute, signal-dependent mono/stereo blending, and autonomous search tuning without external discriminators.
Parts used in the FM radio using TEA5767 and PIC16F877A micro-controller:
- TEA5767 single-chip FM stereo radio
- PIC16F877A micro-controller
- Low-noise RF input amplifier
- Fully integrated FM demodulator
- Crystal reference frequency oscillator
- Phase-locked loop (PLL) synthesizer
TEA5767 single-chip FM stereo radio.
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* High sensitivity due to integrated low-noise RF input amplifier
* FM mixer for conversion to IF of the US/Europe (87.5 MHz to 108 MHz) and Japanese
(76 MHz to 91 MHz) FM band
* Preset tuning to receive Japanese TV audio up to 108 MHz
* RF Automatic Gain Control (AGC) circuit
* LC tuner oscillator operating with low cost fixed chip inductors
* FM IF selectivity performed internally
* No external discriminator needed due to fully integrated FM demodulator
* Crystal reference frequency oscillator; the oscillator operates with a 32.768 kHz clock
crystal or with a 13 MHz crystal and with an externally applied 6.5 MHz reference
frequency
* Phase-locked loop (PLL) synthesizer tuning system
* I2C-bus and 3-wire bus, selectable via pin BUSMODE
* 7-bit IF counter output via the bus
* 4-bit level information output via the bus
* Soft mute
* Signal dependent mono to stereo blend [Stereo Noise Cancelling (SNC)]
* Signal dependent High Cut Control (HCC)
* Soft mute, SNC and HCC can be switched off via the bus
* Adjustment-free stereo decoder
* Autonomous search tuning function
* Standby mode
* Two software programmable ports
* Bus enable line to switch the bus input and output lines into 3-state mode
For more detail: FM radio using TEA5767 and PIC16F877A micro-controller
- What components are required for this project?
The project uses the TEA5767 single-chip FM stereo radio and the PIC16F877A micro-controller. - Can the TEA5767 operate without an external discriminator?
No external discriminator is needed because the chip includes a fully integrated FM demodulator. - How does the oscillator function in this system?
The oscillator operates with a 32.768 kHz clock crystal, a 13 MHz crystal, or an externally applied 6.5 MHz reference frequency. - Does the TEA5767 support different FM bands?
Yes, it supports US/Europe bands from 87.5 MHz to 108 MHz and Japanese bands from 76 MHz to 91 MHz. - What communication buses are supported by the device?
The device supports I2C-bus and 3-wire bus modes, which are selectable via the BUSMODE pin. - Is there a feature to improve stereo sound quality?
Yes, it includes Signal dependent mono to stereo blend known as Stereo Noise Cancelling (SNC). - Can the soft mute feature be disabled?
Yes, soft mute along with SNC and HCC can be switched off via the bus. - Does the tuner require manual adjustment?
No, the device features an adjustment-free stereo decoder and an autonomous search tuning function.
