analog circuit

Hello, all, I'm just beginning to learn about designing practical filter circuits. Using tools like Elsie, I think I can choose the components sizes for filters. However, I don't know how to size the components for the expected amperage (to choose the wire size for hand-wound inductors) or...

Hey guys, I'm looking for a circuit that generates -5V from a +5V signal from a microcontroller to open and close a depletion mode n channel-mosfet. I figured this could be done with transistors/solid-state devices but I'm stuck and would appreciate some help with this I'm looking for a...

I'm looking into a way to construct a circuit that can generate ~200MHz negative voltage sine waves (8 channels), where there is 11 degrees of phase offset between the channels (0 deg, 11 deg, 22 deg, ...). I would like to be able to adjust the frequency, phase offset and possibly amplitude of...

Hi, My requirement is that I have an input of 10VC to 32VDC and I have to design a power supply that can convert the said input to 12VDC with a capability of sustaining load of 310mA minimum. As i am looking for a cost effective solution it will require me to design a discreet buck boost...

I'm trying to design a analog square root sub circuit to process an input voltage and output sqrt(vin). I want to Use something other than a log and antilog amplifier with a voltage divider in between but I'm really struggling to design an alternative as I am still learning. I have tried a...

Hi everyone, I watch this video, min 3:30 upward, and it says that the demodulation of AM is when the diode is in the reverse biased but then the current flows!!! isn’t tit the current stop flowing when the diode is reverse biased? Crystal radio circuit analysis/diode demodulation (8-Analog...

Hi everyone, So, as I am reading this part of amazing book, the Celsius zero shift for two -terminal temperature sensor circuit of Fig 21.19 is not fully understood by me. what I understood: -The \[ V_{\text{Temp}} \] at the two terminal of the Zenner diode is directly coming from the circuit...

I am currently reading Gray,Hurst's book Analysis and design of analog integrated circuits, chapter 12, the Common-mode feedback circuit. On page 815, he said the following statement for improvement of resistive output loading of CMFB circuit. The following figure 12.17 is the CMFB circuit after...

as my question state, I am having trouble understanding the circuit using a NMOS/PMOS as a current source or voltage source according to the pins they are connected and also the input and output impedance present when looking at only one pin of the MOS. my lack of understanding comes in the...

Hi everybody, I'm taking a beginners DC circuitry course and I'm trying to learn on my own time about analog circuitry, something which has fascinated me for a while now. One of the things I'm trying to start with is, as the title states, a voltage follower, since this is (supposed to be) a...

Hi Everyone, I have the circuit that controls a dc motor using the L9110s motor driver. It is powered by a 1.5V AAA battery that is stepped up by the TI TPS61027DRCR TO 5V. The goal of this circuit is that when the ITR8307/TR8 Optical IR Sensor sees a white stopping plate, the motor no longer...

I tested a comparator MAX40025 using the universal board and discrete components. The blue curve is one input which is a short pulse, the pulse width is less than 50ns. The green curve is another input which I set to be a constant voltage(the threshold). This constant voltage came from a...

Hi all, I have the circuit attached as a way to ramp voltage up and down based on a customer's input of dual 4-20mA signals. This will then be turned into a PWM signal to control our motor. Is there a graceful way to handle the 4-20mA signals, as there can't be an instantaneous change. The ramp...

Hi Guys, noob here. - I have board A and board B. Both have MCUs. - I have a reset signal going from board A to board B. The reset signal is normally HIGH (3.3V) - I have a digital input signal (logic 3.3V) going from board B to board A. - current implementation is two wires going to board A...

I am studying the schematics of an analog isolator with variable gain (SIM 984 from SRS0, the isolator is bipolar and can handle positive and negative voltages. In the isolation part of the schematics (see picture below), the author uses two voltage references circled in red. Having read the...

I have been doing a school project in which I need to figure out the working principle of an existing BJT circuit, and then design a corresponding CMOS circuit of the same function and similar performance. Sort of like converting BJT technology circuits to CMOS circuits. In this picture there's...

I have the LTC2668 on my board, I am doing signal verification on it. https://www.analog.com/en/products/ltc2668.html#product-overview I found that all SEL1~8 outputs have weird drop of voltage before the main pulse as shown in the waveform below (this sudden voltage drops always happens at a...

Hi, I am hoping I may be able to get some guidance and or ideas in identifying a problem I have with an instrumentation amplifier I have designed. I have simulated the design in Circuit Lab, however I am not getting the expected output as desired during a DC sweep. Essentially, I have a voltage...

Hello, I would like to use comparator MAX40025A from Analog Devices. In the datasheet, it mentions that the input common range is from 1.5V to VDD + 0.1V which I don't understand the meaning. Does it mean both the input should be in this range, or the average of two inputs should be in this...