Contents
When does a ramp generator start in a linear circuit?
Hank Zumbahlen, with the engineering staff of Analog Devices, in Linear Circuit Design Handbook, 2008 In the ramp run-up architecture shown in Figure 6-72, a ramp generator is started at the beginning of the conversion cycle. The counter then measures the time required for the ramp voltage to equal the analog input voltage.
Which is the ideal slope of a ramp generator?
The initial slope of the ideal ramp response, − 1/ sRC, is −1/ RC. Thus, Fast Miller ramp generators are driven by an input current source instead of a voltage source and R. This produces a more linear response and reduces the effect of input impedance.
What kind of ramp generator is used in CRT?
The sweep generator is a gated ramp or sawtooth generator that drives the horizontal deflection amplifier. Ramp generators are also used in magnetically deflected CRT display systems to generate deflection-coil currents.
Which is an advantage of a bootstrap ramp generator?
The designed circuit showed that there is an advantage of the bootstrap ramp generator based on the bipolar junction transistor differential pair amplifier is that the amplitude of the ramp can approach the level of the supply voltage.
The counter then measures the time required for the ramp voltage to equal the analog input voltage. The counter output is therefore proportional to the value of the analog input. In an alternate version (shown dotted in Figure 6-72 ), the ramp voltage generator is replaced by a DAC which is driven by the counter output.
Is the charging curve a linear voltage ramp?
A small portion of the charging curve looks linear, and the total effect is a nearly linear ramp, over about 1 second, from 0v to just under the supply voltage. I searched around for voltage ramp circuits but because I made this one I understand it and I’m very happy with the result.
How to build a ramp generator with transistors?
In this project, we will show how to build a ramp generator circuit using transistors and a few other simple components, resistors and a capacitor. This circuit requires no integrated chips. A ramp generator is a signal generator which generates a ramp waveform.