Circuits & Schematics: frequency meter - 8

71. Voltage-To-Frequency Conversion Simplifies Microvolt Measurements
    Circuits Analogue Design Measurement Analog Devices AD650
    .. varies with the solution's concentration. Designers can make such microvolt measurements using a precision voltage-to-frequency converter (VFC) along with a programmable instrumentation amplifier (IA). The setup measures the ...
    Jan 29, 2018

72. Instrumentation amp has low offset, drift, and low-frequency noise
    Circuits Analogue Design Analog Devices AD8231 AD8250
    .. instrumentation amplifiers having voltage gains of a multiple of 10 and requiring low voltage offset, drift, and low-frequency noise. Figure 1. By cascading an autozeroed instrumentation amplifier having a gain of 23 and ...
    Feb 8, 2018

73. Input Clock Adjusts Frequency of Digital Ramp Generator
    Nick Ierfino
    Circuits Oscillators Analog Devices DAC08
    .. not always easy to design a ramp generator whose ramping frequency can be changed without manipulation of capacitors or inductors. Many ramp circuit designs are ...
    Mar 19, 2018
74. Independent Width and Frequency Adjustment Bipolar Impulser
    Circuits Oscillators Power Texas Instruments CD4001B CD40106B
    .. Shustov, Tomsk A simple driver circuit of bipolar pulses with separate and independent frequency adjustment and duty cycle is given. Bipolar pulses are mainly used to switch transistors alternately in ...
    Aug 15, 2018
75. Rectangular Pulse Generator with Independent Frequency and Duty Cycle Control
    Circuits Oscillators Texas Instruments CD4070B CD4077B CD40106B
    .. Shustov, Tomsk A diagram of a rectangular pulse generator with independent frequency control from 1 to 10 kHz and duty cycle from 0 to 100% is given. The problem of designing impulsers ...
    Aug 29, 2018
76. High Clock-to-Center Frequency Ratio LTC1068-200 Extends Capabilities of Switched Capacitor Highpass Filter
    Frank Cox
    Circuits Analogue Design Linear Technology LTC1068
    .. with the clock and end up in the passband of the filter. Unfortunately, the passband of a highpass filter extends upward in frequency by its very nature. If you have to band limit the input signal too much you will also limit the ...
    Nov 2, 2018
77. Analog-to-digital frequency-dependent relays
    Circuits Measurement Texas Instruments CD4011B
    .. Shustov, Tomsk The operation principle is described and the diagrams of analog-digital frequency-dependent relays, whose switching occurs when the certain setting valuation input frequency is exceeded ...
    Nov 2, 2018
78. Frequency Quadrupler Enables Low-Frequency Measurements, Spans Up To Four Decades
    Circuits Measurement Texas Instruments CD4070B CD4093B CD40106B LM339A LMV324
    .. often too short for the signal relatively long period. This non-critical circuit automatically multiplies an input single frequency times four to enable measurement of frequencies from 1 Hz to 40 kHz, tracking step changes in the input ...
    Jan 4, 2019
79. Dither a power converter's operating frequency to reduce peak emissions
    Robert Bell
    Circuits Analogue Design Measurement Texas Instruments LM5020 LMC7215
    .. and can compromise a system's performance. Emission peaks typically occur at the converter's fundamental switching frequency and gradually reduce in amplitude at each higher order harmonic, with most of the emitted energy ...
    Jun 25, 2019
80. Digitally controlled potentiometer sets cutoff frequency
    Chuck Wojslaw
    Circuits Analogue Design Linear Technology LT1097
    .. traditional method of controlling the upper cutoff frequency in the basic inverting-amplifier circuit of Figure 1 is to add capacitor C in parallel with R 2 . The ...
    Sep 11, 2019

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