MC12147 - LOW POWER VOLTAGE CONTROLLED OSCILLATOR BUFFER
Motorola Semiconductor (now NXP Semiconductors)
Key Features
citance effects of the varactor which controls the tank resonant frequency and tuning range. Now the results calculated from Equation 2, Equation 3 and Equation 4 can be substituted into Equation 1 to calculate the actual frequency of the tank. To aid in analysis,.
500 - 2800 MHz SINGLE CHANNEL FREQUENCY SYNTHESIZER
Full PDF Text Transcription (Reference)
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Low Power Voltage Controlled Oscillator Buffer
The MC12147 is intended for applications requiring high frequency signal generation up to 1300 MHz. An external tank circuit is used to determine the desired frequency of operation. The VCO is realized using an emitter–coupled pair topology. The MC12147 can be used with an integrated PLL IC such as the MC12202 1.1 GHz Frequency Synthesizer to realize a complete PLL sub–system. The device is specified to operate over a voltage supply range of 2.7 to 5.5 V. It has a typical current consumption of 13 mA at 3.0 V which makes it attractive for battery operated handheld systems. NOTE: The MC12147 is NOT suitable as a crystal oscillator.
MC12147 Datasheet
