Radio receiver for mobile reception with sampling rate oscillator frequency being an integer-number multiple of reference oscillation frequency

摘要: Digital tuning of a locally generated frequency supplied to converting mixer, mobile radio receiver is provided with great economy components by utilizing the sampling rate oscillator for an analog-to-digital converter at output analog intermediate amplifier as source difference phase locked loop (PLL) control local mixer or mixers. All frequencies used supply oscillations mixers, well operating are integer number multiples pulse generator. Some division stages have fixed dividers and others divisors selectable processor in some divisor connections it useful interpose selectable-factor multiplier. A 42.75 MHz recommended which rational multiple 57 kHZ, preferably 10.6875 similarly recommended.