Showing posts with label Microphone. Show all posts
Showing posts with label Microphone. Show all posts
Tuesday, November 18, 2014
Microphone Pre Amplifier 9 12Volt Discrete
This is a microphone pre-amplifier ambit that use detached components. The accretion of this ambit is 100 and should be abundant for best microphones. It is set by the arrangement of the 10k resistor to the 100R. As common-emitter amplifiers, This ambit uses two anon accompanying transistors. Here is the schematic diagram of circuit:
Please note that this ambit has no bent voltage source, so you can’t use with condenser blazon microphones. You can use this ambit with activating blazon microphone, or condenser electret bore with alive ambit central (any microphone which is able with array central can be used).
Tuesday, October 28, 2014
Microphone Amplifier using MAT02
This microphone amplifier circuit electronic project is designed using MAT02 dual monolithic transistor and few passive electronic components .This microphone amplifier circuit allow use of microphones with different impedance and provides a voltage gain of 20 dB and 23.5 dB (amplification 10 and 15), selectable from a switch. Preamplifier has two stages with direct coupling and reaction, and the input stage operates at very low collector current to minimize the noise.
Output impedance is approximately 70 ohms at a gain of 23.5 dB. Low power consumption (approx. 2.5 mA) and power from a 9V battery make it ideal for portable applications. Since the resistor R3 is responsible for input impedance and a few other important features of preamplifier, with R3 = 220 k, the input impedance is 30 k. Change the value of R3 to 6.8 k input impedance dropped to about 1 k.
Subscribe to:
Posts (Atom)