Circuits & Schematics: frequency

1. 3.5GHZ Frequency Counter
   Circuits Measurement Microcontrollers Usage
   .. Frequency counter is a very important test instrument for Radio Amateurs, especially those who wish to develop or ...
   15-07-2010

2. 40 MHz Frequency meter on ATmega16
   Circuits Microcontrollers Usage Measurement
   .. article shows how to build a small, cheap and simple frequency meter, without any fancy, out of reach components. The simple proposed design can measure frequencies ...
   29-06-2010

3. 50 MHz frequency counter, voltage meter & SWR/PWR indicator
   Circuits Microcontrollers Usage Measurement
   .. by 28-pin device PIC16F876. The later is capable of driving 4 digit LED display in multiplexed mode while measuring frequency, power supply voltage as well as handle two analog inputs to display SWR/PWR signal strength in a ...
   09-07-2010
4. Frequency dithering enhances high-performance ADCs
   Circuits Linear Technology LTC1799
   .. Even briefly saturating the A/D converter adds more nonlinearities than dither can remove. Another approach adds a dithered-frequency, constant-amplitude signal. Figure 1 shows one possible implementation featuring a Linear LTC1799 ...
   05-06-2018
5. Turn DDS Chip Into Low-Frequency Arbitrary Signal Generator
   Circuits Measurement AD9833
   .. Munoz In a prior research project in the communications field, we created a portable, low-frequency (0 to 1 MHz) signal generator design. This generator had a broad output voltage range (0 to 100 Vp-p) ...
   06-04-2011
6. 2-Wire Keypad Interface Using a 555 Timer. Part 2 Frequency and Pulse outputs, Significance of Rp and Cp values, Role of Rc resistor
   Circuits Microcontrollers Usage
   .. 1. Theory and Schematic Frequency and Pulse outputs Click to enlarge There are two outputs in this circuit. One is the frequency output ...
   18-04-2011
7. Simple Generator Provides Very-Low-Frequency/Distortion Sine and Square Waves
   Circuits Analogue Design Oscillators Linear Technology LTC6244HV
   .. with a low-pass phase-shift network configuration rather than the more-common high-pass network. Figure 1. This very-low-frequency sine- and square-wave generator requires few components, but provides low-distortion outputs (derived ...
   02-04-2018
8. Simple sawtooth generator operates at high frequency
   Circuits Oscillators Measurement
   .. use in low-power applications operating at frequencies as high as 10 MHz and beyond and those in which ramp linearity and frequency accuracy are not prominent concerns. Figure 1. You can use the C T ramp’s charge and fast ...
   02-10-2012
9. Linearize optical distance sensors with a voltage-to-frequency converter
   Circuits Automation Measurement Microcontrollers Usage
   .. the mathematical inverse of an analog voltage by converting it to frequency and measuring the period. A popular series of inexpensive distance sensors integrates an infrared ...
   10-02-2013
10. Dramatically increase the frequency range of RC-based voltage-controlled oscillators
    Circuits Analogue Design
    .. Stafford, Pittsburgh, PA EDN A typical voltage-to-frequency converter also known as a VCO (voltage-controlled oscillator) IC has a simple linear tuning ...
    27-03-2013

Sort by: relevance / date