Frequency synthesizer

A frequency synthesizer is provided that is capable of supplying a plurality of accurate frequencies. The frequency synthesizer comprises a resonator matrix including a plurality of resonators embedded in a single monolithic piece of piezoelectric crystal. The resonators are arranged in rectangular row and column configuration including m rows and n columns. Each of the rows of resonators bears a metallic electrode stripe for that row and each of the columns of resonators bears a metallic electrode stripe for that column, the electrodes row stripes being positioned on the top surface of the crystal and the electrode column stripes being positioned on the bottom surface of the crystal. Two diode arrays are positioned on the periphery of the crystal for addressing the individual row electrode stripes and the individual column electrode stripes so that any desired resonator can be activated by connecting the stripe corresponding to its row address and the stripe corresponding to its column address to a suitable active oscillator network.