Data control variable frequency oscillator

As shown in FIG, VT1 ~ VT11 base bias circuit 11 added to the binary data (high level 1 to low level 0 ), there are 211 2048 combinations. When a bit is low, the corresponding

VT turns on, the C2 by RA + R2 charging it, RA conducting pipe for the equivalent resistance of the resistor, the oscillation frequency

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