All Questions
Tagged with load capacitance
13
questions
1
vote
1
answer
226
views
How to find resistance, inductance, and capacitance of a load/device
I'm planning to make a proper simulation of a circuit. Before the simulation, I need information about the load (resistance, inductance, and capacitance).
Example: the load is a CPU. range of wattage ...
- 33
0
votes
1
answer
375
views
How does capacitive loading and inductive loading differ from resistive load?
A voltage source is loaded when current is drawn from it. Usually we have voltage sources in circuits and not current sources. A resistive load draws current from a voltage source that is a function ...
- 2,103
0
votes
2
answers
476
views
CMOS active crystal oscillator load capacitance, to be used for PLL reference
I do not have a clear idea of what load capacitance is. I am looking forward to use the ADF4106 PLL with a ~580 MHz VCO to synthesize the frequency.
For the reference input to the PLL, I wanted to ...
- 59
2
votes
1
answer
341
views
How much to increase crystal load capacitance based on this inaccuracy?
The frequency of my 40MHz crystal is 10.6 ppm high, how much should I increase my load capacitance? I am using 12pF crystal with 15pF load caps. As I understand if caps need to be unbalanced the ...
- 543
2
votes
1
answer
203
views
Estimating load capacitance when connecting two opamps?
I plan to use the OPA657 as a charge sensitive pre-amplifier for measuring the output from a reverse biased PIN photodiode. I would like to further amplify the signal using a wideband EL5163 opamp. ...
- 1,137
1
vote
1
answer
90
views
Drop-out voltage at the input using MOSFET
Please have a look at my below circuits.
The first one is an MOSFET. N-MOS.
Gate is fed with a function generator input of 5V peak to peak. 1kHz frequency. 1ms period. 90% duty cycle.
Drain is ...
user220456
0
votes
1
answer
628
views
Capacitor Voltage Hold up (During Input Power Interruption)
I want to understand how long a capacitor can provide the stable voltage for a given load current, in the event of an input voltage interruption?
Suppose, I have a single 100nF input capacitor at my ...
user220456
1
vote
2
answers
239
views
MEMS Oscillator not running, why?
For the latest iteration of my prototype, I replaced a quartz oscillator with (what I thought would be) a drop-in MEMS replacement: the DSC6013CI2A-033.0000.
It is suppling a 33 MHz clock to a TLC5955 ...
- 161
0
votes
0
answers
53
views
Does parasitic capacitance increase the load value of electrodes?
I'm reading Samsung Display's patent about a display notch. In this patent, the inventors say that providing a parasitic capacitance to scan lines increases their load values. Can anyone tell me why?
- 11
5
votes
2
answers
399
views
I know it has small phase margin.. but why is it oscillating not at rails?
I came across an issue at my workplace with the following circuit. I did a OL response and saw that the gain margin is 21 db and the phase margin is 14 deg. Clearly not so good. Note that the 680nF ...
- 312
0
votes
1
answer
45
views
How to get the same output signal but with an increased capacitive load?
I'm designing a CMOS circuit of a VCO and it works perfectly fine when tested independently. Now when I cascade an other block like a divider to it, the output isn't the same as before. Rather its ...
- 197
10
votes
1
answer
26k
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how to select capacitor for a crystal oscillator
Here is a 32 MHz crystal from one of TI's reference design
The BOM list defines the crystal as
...
- 738
2
votes
2
answers
570
views
What loading capacitor do I use for my crystal?
I am using this crystal (the 7.3728 MHz variant).
The datasheet specifies a 5pF to 55pF load capacitance; is this really so? I was under the impression that most quartz crystals had an optimal ...
- 31.9k