Circuits & Schematics: Volt

1. Multiple power supplies fortify high-side gate control
   Circuits Supply Microchip MIC4680
   .. transition. Instead, transistors Q610 and Q611 are simple source-followers. As the gate voltage rises more than about a volt above the present value of net VeeDrive shown in Figure 1 at the source terminals of Q610 and Q611, Q611 turns ...
   14-02-2024

2. "Sub-zero" op-amp regulates charge pump inverter
   Circuits Analogue Design Supply Texas Instruments TLV9064
   .. op-amp outputs “live” and below zero volts is a job where a few milliamps and volts (or even fractions of one volt) of regulated negative rail can be key to achieving accurate analog performance. The need for voltage regulation ...
   09-02-2024

3. Low-cost precision adjustable current reference and application
   Circuits Measurement Supply Microchip LM4040
   .. Figure 1. Adjustable current sink with good precision and other desirable characteristics. To start with, a 2.5-volt voltage reference is produced by an inexpensive shunt regulator chip. The long-used and widely available (and ...
   19-10-2023
4. 5V powered, 0.0015% linearity, quartz-stabilized V-F converter
   Circuits Measurement Analog Devices LT1461 LT1671 LT1884 LTC1043
   .. C temperature coefficient. A1 servo controls A2 FET switched current sink via clock synchronized flip-flop to maintain zero volt summing junction (Σ). Loop repetition frequency directly conforms to input voltage. In charge pump ...
   29-08-2023
5. 300 volt, 4 second, self-calibrating Shannon decoder DAC
   Circuits High Voltage Measurement Microchip LM4040
   .. it relies on electromechanical relays for switching, the archaic technology being attractive because this SD has a 300-volt full scale output. There are of course ways to implement solid state (i.e., fast) switching solutions that can ...
   06-07-2023
6. Shannon decoder DAC meets UART
   Circuits Signal Processing, Filters Microcontrollers Usage Texas Instruments LMC555 TLV2371
   .. Figure 2 The SDD with 5V asynchronous serial data, similar to a µC UART output. Figure 2 illustrates an SDD for 5-volt asynchronous serial data of the sort a µC UART might output, and Figure 3 is its timing diagram. ...
   29-06-2023
7. Simple fixture statically tests programmable-gain amplifiers
   Circuits Measurement Amplifiers Analog Devices AD8253
   .. first glance. However, any fraction of a millivolt of the input-voltage offset times a gain of 1000 yields a fraction of a volt at the output. When you calculate the differences of the 10.02-mV and 0 V output voltages for the respective ...
   29-03-2023
8. Method sets voltage in multiple-output converters
   Circuits Supply onsemi MC33023 MBR2030CTL MURS120T3
   .. current only during its on time, and an internal resistive-voltage drop exists in the secondary output. Therefore, the volt-time product of the main transformer's secondary output is not exactly zero, which is a required condition ...
   08-03-2023
9. ±500 Volt Protection Circuit
   Circuits Measurement Microchip LND150N8-G
   Introduction A 500 V protection circuit for low voltage high impedance measuring instruments is shown in Figure 1. The protection is accomplished by limiting the amount of current going into the measuring instrument. The circuit will protect ...
   29-12-2022
10. Simple circuit shuts off system when supply voltage is low
    Circuits Supply Microchip LM4041
    .. however, IC1’s “-” pin will be near ground when the voltage across R1 is less than 1.24 V, and about a volt below V+ when the voltage across R1 is greater than 1.24 V. Figure 1. This low-cost, space-saving circuit will ...
    13-10-2022

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