Use opa37 composed of the head preamplifier circuit diagram

The circuit is a 90s common recorder head amplifier circuit that utilizes the ultra-low noise precision operational amplifier OPA37 as a preamplifier. This circuit is capable of providing standard NAB equalization. At a frequency of 1 kHz, it achieves a voltage gain of 50 dB. Audio input signals from the pickup head are fed into the non-inverting input of the OPA37. This configuration allows the operational amplifier to maintain a high input impedance, meaning that the connection from pin 3 of the OPA37 to ground can be approximated as an open circuit. The circuit includes RL and CL, which represent the load consisting of the head impedance. It is advised to use the manufacturer's recommended values for the head. For optimal performance, high-quality metal film resistors and film capacitors should be utilized in the circuit.

The 90s common recorder head amplifier circuit is designed to enhance audio signals captured from a magnetic pickup head, ensuring that the integrity and quality of the sound are preserved. The OPA37 operational amplifier is selected for its ultra-low noise characteristics, making it suitable for high-fidelity audio applications. The circuit's configuration with a non-inverting input allows for a high input impedance, which is critical for minimizing loading effects on the pickup head and ensuring accurate signal reproduction.

The voltage gain of 50 dB at 1 kHz indicates that the circuit is capable of significantly amplifying weak audio signals, which is essential for effective playback and recording. The use of standard NAB equalization ensures that the frequency response of the audio is tailored to the specifications commonly used in professional audio applications, providing a balanced sound profile.

The RL and CL components are essential in defining the load characteristics of the circuit. The head impedance should align with the manufacturer's specifications to achieve optimal performance. The choice of high-quality components, such as metal film resistors and film capacitors, is recommended to minimize noise and distortion, further enhancing the fidelity of the audio signal.

Overall, this circuit exemplifies a well-thought-out design that prioritizes audio quality and signal integrity, making it suitable for use in both professional and high-end consumer audio equipment. Proper implementation of this circuit will yield a reliable and high-performance audio amplifier for magnetic pickup heads. Circuit 90s common recorder head amplifier circuit, the choice of ultra low noise precision op amp OPA37 pre-formed head amplifier. Circuit can provide a standard NAB equalizat ion. At 1kHz voltage magnification of 50dB. Audio input signals from the pick-up head means and into the noninverting input OPA37 This connection allows operational amplifier having a high input impedance, i.e. OPA37 pin 3 to ground can be approximated as an open circuit, the circuit RL, CL is the load consisting of the head impedance.

The head should be used manufacturers recommended value. Circuit resistance, capacitance element should be used in high-quality metal film resistors and film capacitors organic synthesis.