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Fast Symmetrical Zener Clipper
The problem with using two zeners back to back in series to get symmetrical clamping is that the knee of the
ICla and b are biased into the linear regions by R3 and R4. (ICI must be 4011A)
4 microphones mixer circuit with TL081
A TL081 op amp is used as a high impedance to low. converter and a signal mixer. The input impedance is about 1 megohm and the output impedance is about 1 kohm. Two 9 volt batteries are used as power source.
High-level four-channel mixer
To provide good signal-to-noise ratio, this four channel mixer amplifier controls the signal levels after the amplifiers, and then mixes them to offer a combined output. The circuit works with any 50 ohm to 50 K dynamic microphone but not with crystal or ceramic mikes because the IC input impedance is low
Dynamic Audio Mixer
The dynamic mixer combines two audio inputs by adding the primary signal, Input A, to a gain-controlled signal, Input B
Two channel panning circuit
This panning circuit (short for panoramic control circuit) provides the ability to move the apparent position of one microphone"s input between two output channels. This effect is often required in recording studio mixing consoles
One transistor audio mixer
Three or more inputs with individual level controls feed into the base of Q1
Three audio circuits are combined in the circuit shown. Each input is coupled to its own level potentiometer (Rl, R2, or R3) an
One transistor audio mixer (2N3563)
This circuit mixer has an internal amplification with 2N3563 transistor. The two input signals can be independently controlled by VRI and VR2. The VR3 balance control is used to remove a signal while the other melted.
Silent audio switching-mixing
Two or more signals can be switched and/or mixed without annoyingclicks by using FETs
The 741 op amp is used as a summing amplifier to combine several audio inputs
Low Noise 4 Channel Guitar Mixer Circuit
ICl-a, ICl-b, IC2-a, and IC2-b all function with a gain of about 19. Their outputs are mixed via the level-control pots and the resulting signal amplified by IC3-a and fed to tone-control stage IC3-b.
Mixer preamplifier with tone control
General purpose preamplifier/mixer accepts up to four inputs, has a gain of 1600, and provides bass and treble controls that can be varied Â± 10 dB at 100 Hz and 10 kHz respectively
No description available.
Four inputs can be mixed by duplicating the circuit to the left of C3 and using the fourth gate of ICI. Two gates are used in a touch-operated switching circuit that controls the voltage on the base of switching transistor Q2
The proposed mixer is designed around four current-driven transconductance amplifiers contained in an SSM2024 from Precisio
This circuit uses buffer stages to prevent channel crosstalk back through the mixer resistor network. The potentiometers used for each stage allow for convenient signal strength adjustment, while maintaining input impedance matching at the 600-0 audio standard.
Unity-Gain Four-Input Audio Mixer Circuit
The circuit has four inputs. The voltage gain between each input and the output is held at unity by the relative values of the 470kH input resistor
A simple digital mixer, based on two dual-Schmitt triggers (4583B) and three exclusive-OR gates, uses an RC time-delay circui
A high signal-to-noise ratio is important in signal construction and combination. The HA-5147 aids in lowering overall system noise and thereby raises system sensitivity. The signal combination circuit incorporates input bufferiug with several other features to form a relatively efficient mixer stage with a minimum of cham1el crosstalk. The potentiometer used for each channel allows for...
Audio Mixer Circuit
Designed around an LM3900 quad op amp, this mixer combines 2-line and 2-mike inputs and sums them at the output terminal.
Four-input stereo mixer
Four (or more) inputs can be mixed and produce stereo output. Gain of each stage can be boosted by adding RX, but it should be kept below 50 (RX above 2 K) to avoid poor frequency, response. If more than four stages are used, decrease RXto 6 K for six inputs, or 4 K for eight inputs
This simple circuit can be used to combine stereo signals to produce a monaural output
4 channel audio mixer with TL074
This circuit can be used as a mixer and a stereo track four. The quad op-RNAP IC gives a little gain for each track, the pan control provides panning between one and two tracks with the switch to high, and with the switch to low, it is possible to pan between the tracks and three four channels can be added.
Stereo Mixer With Pan Controls
This stereo mixer has two mono mixers and a modification to the microphone inputs. When a microphone is in u
Four channel mixer
High gain op amp combines up to four individually controlled input signals
This mixer is built around a TL072 dual BiFET op amp with a JFET input stage, and can be powered from a single-ended 9-to 18-V power supply. The microphone input is capacitively coupled to the noninverting input of U1a. Resistors R1 and R3 set the voltage gain at about 26 dB and serve as a negative feedback network for U1a. Capacitors C1 through C3 are de-blocking capacitors. Most...
Precision Full-Wave Rectifier
Using two op amps, this circuit produces a full-wave rectified version of the input signal. Op amp IC1 invert
Audio input selector circuit (4416 CMOS)
CMOS switches are used directly to select the entries in the audio circuits, it can introduce unacceptable levels of distortion, but if the switch is included in the feedback network of an op amp, the distortion due to the switch may be virtually eliminated. The circuit uses a CMOS switch 4416, arranged as two independent SPDT switches. If switching transients are unimportant, R5 and C1 can be...
This circuit illustrates some possible buffer combinations. Tbese include a differential input stage, a voltage follower as well as both noninverting and inverting stages. The allowable resistor ratios and recommended device types are also included. One restriction applies to this type of mixernetwork in which Rg is greater than 2.4 KO.
By inserting a high-pass filter section in the IF lead, this mixer is terminated at all frequencies, besides the IF, for oth
mic mixer circuits
The mixer circuit below has 2 line inputs and 2 mic inputs, 2 line outputs. The mic inputs are suitable for low impedance 200-1000R dynamic, simple mixer was designed for three dynamic microphones.
Vacuum Tubes Valves
Musical & effects