Mikrofon Preamfi devresi

Mikrofon Preamfi devresinde LM1458 (Dual Operational Amplifier) ve TL071 (Low-Noise JFET-Input General-Purpose Opamp) üzerine kurulu ayrıca Ton kontrol özelliğide var.

In a previous article described the construction of a microphone preamplifier with bass and treble controls, in order to correct the frequency response depending on the characteristics of the vocal operator and the technical characteristics of the microphone Following indications from some readers, in a subsequent article, published in March 2002, proposed the construction of an equaliser five gangs, which control the frequency response was more complete.

LM1458 : Dual Operational Amplifier

No frequency compensation required
Short-circuit protection
Wide common-mode and differential voltage ranges
Low-power consumption
8-lead can and 8-lead mini DIP
No latch up when input common mode range is exceeded

TL071 : Low Noise JFET Input General-Purpose Operational Amplifier

Low Power Consumption
Wide Common-Mode and Differential
Voltage Ranges
Low Input Bias and Offset Currents
Output Short-Circuit Protection
Low Total Harmonic Distortion
. . . 0.003% Typ
Low Noise
Vn = 18 nV/?Hz Typ at f = 1 kHz
High Input Impedance . . . JFET Input Stage
Internal Frequency Compensation
Latch-Up-Free Operation
High Slew Rate . . . 13 V/µs Typ
Common-Mode Input