Crystal oscillator circuit diagram of a compatible IC

Temperature-stable resistors R1 and R2 are used in NAND gate configurations, ensuring that the switches operate in the linear region. Capacitor C1 functions as a DC component at the operating frequencies. Additionally, the impedance must remain below 0.1 ohm. The circuit operates in resonant mode with a transistor in series, characterized by low series resistance. The AT cut method for the transistor is effective within the 1-10 MHz frequency range.

The described circuit configuration utilizes temperature-stable resistors R1 and R2, which are critical for maintaining consistent performance across varying thermal conditions. These resistors are integral to the NAND gate logic, ensuring that the output remains stable and predictable when the input conditions are met. The linear operation of the switches is crucial for minimizing distortion and ensuring that the circuit operates efficiently.

Capacitor C1 serves a dual purpose in this configuration. It acts as a coupling capacitor that filters out AC components while allowing DC signals to pass through, which is essential for maintaining the integrity of the signal at the operational frequencies. The specification that the impedance must be less than 0.1 ohm indicates a focus on minimizing losses and ensuring that the circuit can respond quickly to changes in input signals.

The circuit's operation in resonant mode suggests that it is designed to take advantage of the natural oscillations within the system, likely enhancing the gain and efficiency of the transistor. The inclusion of a series transistor with low series resistance is vital for achieving high-frequency performance, as it reduces the voltage drop across the transistor and allows for better signal fidelity.

The use of the AT cut method for the transistor is particularly noteworthy, as it allows for stable frequency performance within the range of 1-10 MHz. This method involves cutting the crystal at a specific angle to optimize its frequency response, making it suitable for applications requiring precise timing and frequency stability. Overall, this circuit design reflects a careful consideration of component selection and configuration to achieve reliable operation in high-frequency applications.Temperature stable resistors R1 and R2 NAND gates, they ensure that the switches in the linear region open. Capacitor C1 is a DC component at the operating frequencies, the impedance must be less than 0.1 ohm. It runs in a resonant mode transistor in series. Its series resistance is low, transistor AT cut method also can work within 1-10MHz range.