Make a simple AM ​​radio with digital circuitry ---- AM Radio

Make a simple AM ​​radio with digital circuits, am Radio Keywords: easy AM radio with digital circuitry Make a simple AM ​​radio with digital circuitry Here is a simple radio circuit made of CMOS digital circuit CD4011, its radio sensitivity is high. The CD4011 is a digital integrated circuit containing four non-door. Principle: Usually, such and non-door circuits are in two states of switches, i.e., output high and low levels. In fact, during the conversion of the high and low level, there is a transition zone, and the intermediate portion of the transition zone is substantially linear. Therefore, the appropriate operating state can be selected by the feedback circuit, so that each of the non-gates can be in an enlarged state. Next, the electrical material diagram, L1, C1 of the radio are the receiving resonant circuit, and R1 is a DC negative feedback resistor, and C2 is an AC bypass, and the received signal is high frequency amplification, and is coupled by C3. The multiplier detecting circuit composed of D1, D2, R2, and C4 performs detection, and then passes through the door B, C, D, and then sent to the headphone output. The C1 in the figure is optionally mono-variable capacitance, and the coil L can be magnetic at 50 mm. Rod around 80-100T, the headset should select the high-resistance earphone, or increase the primary integrated audio amplification circuit such as LM386, or use triode to impedance transform, by increasing the number of turns on the magnetic rod to ensure the radio is in place Within the frequency reception range.

Our other product:

Professional lightning protection system for Tower	Professional FM Radio Station Equipment Package	FMUSER FU-1000C 1000W FM Transmitter With USB Audio Input Interface
FMUSER 200W FM Radio Broadcasting Package	Hotel IPTV Solution	FMUSER FSN-1000T V5.0 1KW FM Radio Broadcast Transmitter