FOUR FREQUENCY MEASURING PROCESS FOUR COUPLED-DUAL RESONATOR CRYSTALS

摘要

In a third case or way of obtaining four threshold frequencies useful for accurately measuring a double bond resonator crystal, two ports of the crystal structure are monitored rather than a single port in a previously known case. Here, for example, the B port is monitored with the A-side open circuit or with the capacitor connected to itself in parallel, while the A port is monitored with the B-side short circuit.