So I have to guess that the OP meant he has some OEM RF only remote and wants to convert it's output to IR. I assume it's common knowledge that RF universal remotes convert RF to IR all day long. It would be nice to know exactly what the OP means. Most specially, keep the copper lines of the decoupling capacitors to ground as short as possible.
Also, keep the copper lines short and narrow. However, it is highly recommended to provide lots of ground copper plating. Both values must be increased for lower oscillator frequencies but their exact values are not very critical and can be derived experimentally.įrequency converter circuit schematic The pcb design must be very simple due to the simplicity of the circuit. If the desired oscillator frequency is far below 46 MHz, the R1/C3 must also be adapted as well as the L1/C1. The components that need to be redimensioned are the L1/C1 oscillator network and the output filter L2/C5. Following this example, one can modify the circuit to convert other frequencies. This is then mixed with the input signal of 35.3 MHz rezulting to a 10.7 MHz output signal. Using the values given on the diagram, the circuit oscillates at 46 MHz.
Its amplifier component can then be used as the oscillator by adding an LC network to it (L1/C1). The circuit works according to a simple principle: a converter has always a mixer and an oscillator. Although it was designed as an RF amplifier and FM demodulator, it can also be used for many other applications. The IC being used (TBA120) is one of the most common components in radio and TV circuits. It converts the 35.3 MHz signal coming from a VHF/UHF tuner down to an FM tuner to decode the TV audio in FM quality. This is a 35.3 to 10.7 MHz converter circuit. AV to rf converter datasheet, cross reference, circuit and application notes in pdf format. Video and audio mixers) is an active or passive device that converts a signal from one frequency to another. IR to RF converter circuit can convert IR signal into RF signals and at the same time transmit this to remote location and decode them using a compatible RF receiver.
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