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Hi
U1 and U7 are the instrumentation amplifiers (INA163UA). U1 and U7 are supplied with + 15 V all the time .U1 & U & are two different microphone circuits.S1 And S2 are two different Audio amplifiers SSM2211. Both drive headphones.S1 has 5 Volts as power supply all the time whereas S2 is...
thanx saeed131
plz tell me how to give power supply to opamp. if u can suggest the opamp it will be great . i think your circuit in thoeritical not pratical
thanx
i think i am not satisfied with the signal quality.if i input a sine wave of 1 K hz the output with the 8 ohm load is perfect. not much distortion on distortion analyzer but when i input speech, the quality of sound heard in the headset has something missing . i gives over loading effect...
hi
can some body explain the difference between speaker and headphone amplifier.
i have headphone having impedance of 8 Ohm (02 16 ohm each connected in parrallel makes 8 ohms).
i am using SSM2211 speaker amplifier capable of driving 8 ohm loads. i want to ask am i doing the right thing or it...
i think you did not understand the application i am trying to build . i have one headset and to drive it there are two SSM2211, one is the main and other is standby and the selection is controlled by a switch . if you have any other idea to implement the same kindly tell me.
hi
i am doing a project in which i am using class AB audio amplifier to drive 8 ohm headphones.
my project has two similar circuit cards one is the main card and second is the standby card . both have same SSM2211. the power supply is used to switch between the main and standby cards.headphone...
hi
i am trying to do a project . in this i want to design a DPDT transfer switch for two UHF/ VHF commication radios. these radios are connected to two antennae. i have a control switch to switch radios to upper to antenna 1 and antenna 2. the output power of radios is 12 watt. antenna and...
hi
i am using INA163 as microphone amplifier for a 5 ohms symetrical microphone. when the mic is un plugged and power is on it give too much noise. i tried to place resistors at inputs with ground but of no use ., when i place a capacitor across the inputs the noise is gone . can anyone tell me...
thanx for replies
i have tried to connet two resistors from high and low input , but of no use, i tried by varying the value to resistances. than i placed resistor across the high and low and the noise got less . now i am connecting 47 k ohms resistance than the noise is considerably low but it...
use amplifier as microphone
hi
i am using INA163UA instruementation amplifier to detect output of dynamic microphone of 5 ohm impedance. after detecting the signal i amplify it and feed it in summing amplifier and than using audio amplifier ssm2211 i drive a headphone of 8 ohms. the INA163U...
hi
i hope someone will hel;p me . i have LPKF PCB Prototype machine S 62 and ContacIII machines. the chemical used for through hole plating is
Activator 310 from LPKF.
the problem is my machine stopped depositting the copper in the holes. the local rep was approached and he said that Activator...
reading the gal program
hi '
thanx for help . i have done as you said . i read the GAL with the progrtammer and coinverted the jed FILE TO .EQN . I DOWNLOAD THE opal i am attaching the result file if you can view and comment . i think the GAL fuse are not blown .am i right .your reply is...
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