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Category: Inside Circuits Views: 3933 Rank: 3 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 omitted, and R4 may be short-circuited.  However, a return path must be maintained even if a channel is turned off, to keep the inverting input of op amp to ground potential, and avoid excessive crosstalk between channels. Datasheet file1: Click here to download 4416.pdf datasheet. Datasheet file2: Click here to download MC3403.pdf datasheet.
Related circuits Ul (a 4046 PLL containing a voltage controlled oscillator or VCO, two phase comparators, a source follower, and a Zener diode) is used to produce a low-frequency, pulsed output of about 40 Hz. The VCO's frequency range is determined by R6 and C2, which can be altered by varying the voltage at pin... This circuit uses a transistor oscillator and a voltage multiplier to charge CIO and CI 1 to a high voltage. When the spark gap breaks down, T2 produces a high-voltage pulse via the capacitance discharge of CIO and Cll into its primary. Precision Light-Activated Alarm Circuit The light-sensitive CDS cell R8 configured in a bridge circuit with IC1 as a comparator causes ICl`s output to go high when light strikes the CDS cell R8, triggering SCR1. Consistently self-starting and yet capable of operating from over 1 Hz to 10 MHz, this low-cost oscillator requires only five components. This high-performance video-camera link transmits signals from your video camera to your VCR, or from your VCR to TVs throughout your home. The first stage of the rf chain is a crystal-controlled oscillator, Q1, with a frequency of 60 to 65 MHz, which is one-eighth of the final output... Telephone-controlled tape starter This circuit converts a tape recorder into a completely automatic telephone conversation recording instrument that needs no external power source. Voltage at the switch terminals of tape recorder applied to a pair of Darlington-connected transistors, Ql and Q2, will turn on and start the tape... Switching Regulator with L4972A The LA9472A is a 2A monolithic step down switching regulator operating in continuous mode and realized in a new BCD technology allowing the integration of isolated, vertical DMOS power transistors with mixed CMOS/bipolar transistors. The device can deliver 2A at an output voltage adjustable from... Voltage-controlled-current-source-with-grounded-source-and-load This is a simple, precise voltage-controlled current source. Bipolar supplies will permit bipolar output. Configurations featuring a grounded voltage- control source and a grounded load are usually more complex and depend upon several components for stability.
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This circuit serves for connecting the stereo outputs from Four Different channels as inputs and only one of Them is selected to the output at any one time. When the circuit switch on, channel A (AR and AL) is selected.
However, a return path must be maintained even if a channel is turned off, to keep the inverting input of op amp to ground potential, and avoid excessive crosstalk between channels.
Audio. Using TL081 operational amplifier, and a few electronic components can and designed a gain mitigation selector circuit. This TL081 gain mitigation selector allows selecting gain between between +1 and -1 with a potentiometer.
Control TEA6320 Multichannel Audio Selector and Volume Control Circuit automation circuit control Controller Interface.
Best Niles Audio HPS-6 Six-Pair High Power Speaker Selector. NILES HPS-6 -- Enjoy music and talk radio throughout your home, office or retail store as selectively or inclusively as you wish, with this incredibly clean, high ...
Excess Niles Audio HPS-6 Six-Pair High Power Speaker Selector with another product is, the product Niles Audio HPS-6 Six-Pair High Power Speaker Selector has been tested by a team of experts in their field and Niles Audio HPS-6 ... Handles up to an awesome 250 watts per channel RMS; Protection ci...
Composite Audio Video Selector (Metal body)
Wiring a Fender Stratocaster - fitting pickups and volume and tone controls.
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