Using the TDA9887 integrated circuit , manufactured by Philips Semiconductors , can be designed a very simple IF-PLL demodulator with FM radio .
This electronic project is very simple , requiring few external electronic parts excepting TDA9887 IC and must be powered from a 5 volts DC power supply .
Some features of this TDA9887 electronic project circuit are :
Gain controlled wide-band Vision Intermediate Frequency (VIF) amplifier, AC-coupled
Multistandard true synchronous demodulation with active carrier regeneration
Gated phase detector for L and L-accent standard
Fully integrated VIF Voltage Controlled Oscillator (VCO), alignment-free, frequencies switchable for all negative and positive modulated standards via I2C-bus
Digital acquisition help, VIF frequencies of 33.4, 33.9, 38.0, 38.9, 45.75, and 58.75 MHz
4 MHz reference frequency input
VIF Automatic Gain Control (AGC) detector for gain control
Fully integrated sound carrier trap for 4.5, 5.5,6.0, and 6.5 MHz, controlled by FM-PLL oscillator .
AM demodulator without extra reference circuit
Alignment-free selective FM-PLL demodulator with high linearity and low noise
I2C-bus control for all functions
Alignment-free FM radio demodulation at 10.7 MHz
The IC is an alignment-free multistandard (PAL, SECAM and NTSC) vision and sound IF signal PLL demodulator for positive and negative modulation, including sound AM and FM processing. A special function is implemented for the demodulation of FM radio signals (fRIF = 10.7 MHz).