Circuits & Schematics: frequency - 2

11. AVR frequency meter - from 1Hz to 10MHz
    Circuits Measurement Microcontrollers Usage Atmel ATtiny2313
    Frequency meter with some of quite good performance, capable of measuring frequencies from 1Hz to 10MHz ...
    May 17, 2013

12. NE555 timer sparks low-cost voltage-to-frequency converter
    Gyula Diószegi János Nagy
    Circuits Analogue Design Measurement Philips NE555 TL071
    .. producing more than 1 billion of them a year. By adding a few components to the NE555, you can build a simple voltage-to-frequency converter for less than 50 cents. The circuit contains a Miller integrator based on a TL071 along with ...
    Sep 24, 2015

13. Build an adjustable high-frequency notch filter
    Circuits Analogue Design Texas Instruments TLC082
    .. 1. An op amp and a switched-capacitor filter combine to form a highly selective notch filter. Figure 2. This plot is the frequency response of the third-order lowpass-filter stage. You set the passband ripple at approximately 5 dB to ...
    Jun 9, 2017
14. Double µC's PWM Frequency & Resolution
    Alperen Akküncü
    Circuits Microcontrollers Usage Texas Instruments MSP430FR5969
    .. only the LF or DC component that is proportional to duty cycle. However, the low-pass filter can’t filter out the PWM frequency completely, and for that reason, the LF/DC signal will generally have some ripple. There are two ...
    Oct 20, 2017
15. 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
16. 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
17. 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
18. 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
19. 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
20. 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

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