A limiter is a circuit that maintains a constant amplitude for all input signals exceeding a critical threshold. In the context of an FM receiver , its primary role is to eliminate any residual unwanted amplitude modulation and amplitude variations caused by noise. These variations could …
A limiter is a circuit that maintains a constant amplitude for all input signals exceeding a critical threshold. In the context of an FM receiver , its primary role is to eliminate any residual unwanted amplitude modulation and amplitude variations …
In FM radio receiver, the received signal amplitude reaching the receiver antenna can be low as 1uV and if noise level can also be low as 1uV. This presents a problem such low level signal enters the RF mixer . So RF amplifier are used to amplify t…
JFET transistor are typically used in RF amplifier stage in radio receivers. Although there are other types of transistors like BJT, MOSFET and maybe diode can be used. In this blog post, it is explained why is JFET preferred transistor compared to…
Envelope Detector LPF calculator Low Pass Filter Calculator Carrier Freq.(f c ): Hz KHz …
Learn how to design BJT amplifier Quickly using Online Calculator. BJT Amplifier with Voltage divider biasing Below is video that teaches how to use the online voltage divider biasing BJT amplifier online calculator.
Many times we need to design DC level shifting circuit to shift voltage level from one to another such as from +5V to 0V as is done in Operational Amplifier with minimum change in the ac voltage signal that rides on such dc signal. Here are some of …
Here I am sharing a LED sign board schematic diagram which is simple to build. This can be easily be made on a breadboard. The LEDs are connected in parallel. That is each LED anode is interconnected and then connected to the +ve terminal of the bat…
The current-limiting resistor (Rs) , is a resistor placed in series with the anode of the SCR in an overvoltage protection (OVP) circuit. The crowbar overvoltage protection (OVP) circuits can be used in a variety of power supply circuits, includin…
Here it is explained the role of RC Delay circuit in Crowbar Overvoltage Protection Circuit and how to calculate their values. The circuit diagram along with the RC delay in Crowbar Over Voltage Protection circuit is shown below. The resistor ( R ) …
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