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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

cmos

  1. danadak

    CMOS Logic input C limitations

    Discussion why hanging large caps at input of CMOS logic not a good idea (Toshiba App Note) . https://e2e.ti.com/support/logic-group/logic/f/logic-forum/883065/cmos-logic-input-capacitor-maximum-value https://toshiba.semicon-storage.com/info/application_note_en_20210131_AKX00111.pdf?did=63525...
  2. Alex_bam

    Designing Differential amplifier with differential output

    Hello! I have done calculations for designing a differential amplifier (DA) with differential output. I simulate (using cadence ) the DA with the calculated values and perform the DC analysis of the circuit to inquire all the transistors are operating in saturation. However, I did not get all...
  3. Alex_bam

    Problem in demodulating differententially modulated signal.

    Hello everyone, I am designing LPF based differential demodulator(LPF_DDM) to retrieve differentially modulated signals, which are on-chip capacitive isolated [shown]. LPF_DDM includes a differential amplifier, LPF, and Schmitt trigger. I designed a two-stage opamp [specification below], as a...
  4. Alex_bam

    Schmitt trigger based NAND gate

    Hello Everyone, If someone can help me to understand how to calculate the hysteresis of the Schmitt trigger-based NAND gate? Which MOSFET's dimension decides the Vth_H and Vth_L? Thanks.
  5. Alex_bam

    Designing Schmitt trigger oscillator using CMOS NAND gate.

    Hello, I am designing a Schmitt trigger oscillator based on a CMOS NAND gate. The block diagram along with schematics and its results are attached for your reference. I am using the CADENCE tool with 0.35um technology. Question: it can be seen in the result, the charging time of the capacitor...
  6. S

    Bipolar transistor

    Hello everyone, I have a little issue here. I know it's not really hard but it has been a moment since I've worked with circuits like this and transistors, so I can't figure out this circuit... The question is: In DC analysis, calculate the bipolar transistor's voltages Vb, Ve, Vc. Deduce the...
  7. J

    Subthreshold Transconductance Amplifier Design

    As part of a broader project, I am designing IC circuit using CMOS to one of the first steps I'm working on is the filtering a series of pulses with of the noise. The actual pulses are around 1 kHz so I am implementing 2nd order sallen-key high pass filter. Since the capacitance is limited to...
  8. J

    Subthreshold MOSFET Transamp

    As part of a broader project, I am designing IC circuit using CMOS to one of the first steps I'm working on is the filtering a series of pulses with of the noise. The actual pulses are around 1 kHz so I am implementing 2nd order sallen-key high pass filter. Since the capacitance is limited to...
  9. J

    How to make flip-flop (frequency-divider) with schmitt inverter?

    Hi Ideally, i'm looking for a simple frequency divider that i can feed a square wave, using only schmitt inverters or schmitt NAND (just one if possible). Should work over a wide input-frequency range. The posts below provide a schematic for a so-called "flip-flop" (which i think is really a...
  10. A

    USB 2.0 webcam design ideas

    Hi Team, I want to design a USB 2.0 webcam. Could you please guide on the steps involved and the components required (preferably Texas Instruments). I know that a CMOS sensor is required but not sure where to get them and also how to convert the data into a USB format. Thanks, Arun

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