In the general sense a mixer is basically any circuit that combines two or more circuits or signals into a common output. A more commonly used definition defines a mixer as a nonlinear circuit as one that accepts as its input two different frequencies [F1 & F2] and than outputs between two and four signals: The term non-linear refers to a component which causes a current
Click here to download the full size of the above Circuit.
to with the application of a voltage, but the current does not change in a linear relationship with the voltage. See Heterodyning. The standard symbol for a mixer, shown in the right side-bar is a circle with an `X` in the center. The diagram also depicts one of the most common uses of a mixer, that is combing a local oscillator with an RF signal to produce an IF signal. The term mixer describes a function, that of mixing two signals together. So there are a vast number of ways to implement a mixer. The mixers shown on this page include a mixer made from a diode, a transistor mixer, and a vacuum tube mixer. However those are just the component used to provide the nonlinear function, within those three groupings there are even more variations. There isn`t necessarily a need to design a mixer using discrete components. Mixers are also sold as complete self-contained components, refer here for a lost of Manufacturers of RF Mixers. The circuits shown here are just intended to show a few different circuit variations, and not intended to cover the design of a mixer. Unbalanced mixers is a style that allows some of the input signal power to pass through to the output. While a single-balanced mixer is configured so the local oscillator, or RF input, cancels and cannot pass through to the output. However a double balanced mixer has symmetrical paths for both the oscillator and RF inputs, and will have no output if either input...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
characters left: