Lexiwave Technology has introduced LW210 chip FM/AM transmitter system designed for FM/AM communication systems. It includes a Colpitts oscillator, a microphone amplifier, an operational amplifier and an optional RF power amplifier. Targeted applications are in the frequency band from 27MHz to 400MHz. By changing a few external components, energy saving LW210 can support both AM and FM communication.
LW210 includes a Colpitts oscillator, a microphone amplifier, an operational amplifier and an optional RF power amplifier. The output power of the Colpitts oscillator is 0 dBm at 50 ohm load. For higher output power, the RF power amplifier can be connected to the Colpitts oscillator output. The microphone amplifier gain can be set by an external resistor for optimum voltage level. For AM application, the operational amplifier can be cascaded to provide higher output driving capability. The gain of the operational amplifier is set internally to 10dB. A bandgap reference is implemented inside the chip for stable operating conditions over temperature and supply voltage.
Lexiwave Technology
