Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
SOL. Ramp Type VM: The operating principle of the ramp type DVM is based on the measurement of the time it takes for a linear ramp voltage to rise from 0 V to the level of the input voltage or to decrease from the level of the voltage to zero. This time interval is measured with an electronic time interval counter and the count is displayed as a number of digits on electronic indicating tubes.
Conversion from a voltage to a time interval is illustrated by the waveform diagram.
At the start of the measurement cycle, a ramp voltage is initiated, this voltage can be3 positive going or negative going. The negative going ramp is continuously compared with the unknown input voltage. At instant that the ramp voltage equals the unknown voltage, a coincidence circuit a comparator, generates a pulse which open a gate. This gate is shown in the block diagram of.
The voltage continues to decrease with time until it finally reaches 0 V (or ground potential) and a second comparator generates an output pulse which closes the gate.
An oscillator generates clock pulses which are allowed to pass through the gate to a number of decade counting units (DCU's) which totalize the number of pulses passed through the gate. The decimal number, displayed by the indicator tubes associated with the DCU's is a measure of the magnitude of the input voltage. The sample rate multivibrator determines the rate at of which the measurement cycles are initiated. The oscillation of this multivibrator can usually be adjusted by a front panel control, marked rate, from a few cycles per second to as high as 1000or more. The sample rate circuit procides an intiating pulose for the ramp generator to start its next ramp voltage. At the same time a reset pulse is generated which returns all the D.C. Voltages to their 0 state. Removing the display momentarily from the indicator tubes.
Q. A 10-kVA transformer is known to have an iron loss of 150 W and a full-load copper loss of 250 W. If the transformer has the following load cycle, compute its all-day efficiency
Photovoltaics is a high-technology approach to changing sunlight directly into electrical energy. The electricity is direct current and can be used that way, chnag
An 12µF capacitor is connected in series to a 0.5M? resistor across the dc voltage supply of 240V. verify: (a) Time constant (b) Initial charging current (c) Time fo
Using the audiorecorder() function in MATLAB, make a recording of your voice. Use a sample rate of 8kHz, 16 bits per sample, and aim to record around 2 seconds worth. Quantize the
Q. An RG-139/U rectangular waveguide is given to have dimensions a = 0.8636 mm and b = 0.4318 mm. Compute the theoretical and practical frequency ranges of operation for the guide.
Characteristics of magnetic field / flux lines: i. Forming a closing loop ii. Did not crossed against each other iii. Has a certain direction iv. Repel among one anot
Explain Interrupts of 8085. a) Maskable interrupt b) Vectored interrupt c) Non maskable interrupt d) Hardware interrupt e) Software interrupt
if the prime mover input of an alternater connected directly to an infinite bus in increased,then its?
For Parity Flag CPRE (Call on parity even) and CPO (Call or parity Odd) Instruction CPE calls the subroutine from the specified memory location if parity flag is
Ferroelectric materials are characterised by (A) Very high degree of polarisation. (B) A sharp dependence of polarisation on temperature. (C) Non-linear dependence o
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd