OPERATIONAL DESCRIPTION

FCC ID: PIY92961-04A4R

Operational Description

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FCCID_461910

Mattel 92082 RX 49. 860 MHz Receiver Operational Description The 6.0V Sea Arrow is full function radio controlled toy boat It operates on 6.0 volts supplied by 6.0V Nicd battery pack It is designed to operate on a single fixed frequency in the 49.82 – 49.90 MHz band. See the attached block diagram and schematic. The vehicle receiver receives and demodulates the AM transmitted signal from the transmitter, using a standard super-regenerative AM receiver/demodulator circuit comprised of ANT1, Q1, L4, L2, L3 and associated passive components. L3 is a tunable core slug inductor that is used to tune the receiver for maximum sensitivity. The output of the AM receiver/demodulator is AC coupled to a high input impedance CMOS inverter is connected to the U2 decoder IC, it is biased into their linear region through C13, C14, C15, R13, R14, R6, R7 and function as amplify, filter and shape the data. After passing through the last inverter stage, the incoming waveform is a digitized enough to be fed into the IN4in for on-chip decoding. A Zener regulator circuit comprised of C11,C8, Z1,C10, it supplied voltage VDD for the super-regenerative radio, decoder IC. Drive motor is controlled by the U2 decoder IC, low power switching transistors Q8, Q11, and a high power H-bridge comprised of Q6, Q7, Q9,Q10, The steering motor is controlled by the U1 decoder IC low power switching transistors Q2,Q3, Q14,Q15,Q17,Q18,Q19, and high power H-bridge comprised of Q4,Q5,Q12,Q13, All tuning and verifications are performed by the manufacturer and there are no adjustments which can be made by the user. No external ground is required or used with this receiver.


Document Created: 2004-08-11 15:09:01
Document Modified: 2004-08-11 15:09:01
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