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# Self Oscillation Frequency

9 Threads found on edaboard.com: Self Oscillation Frequency

## How to prevent damage of frequency divider IC?

I am afraid that you have a severe PCB layout or/and decoupling problem. Prescalers, as many other circuits, can get in self-oscillation: I never got audible noise from a prescaler, but some DC-DC supplies might enter in a state that generate audio noise.

## working of opampp in L-C meter

In circuits what i have learnt i never used a resonant circuit in non inverting terminal of opamp. Yes, the circuits is somehow unusual. I presume you can calculate the DC thresholds yourself by applying literature formulas. See e.g. The actual hyster

## LM833 Oscillation problem

At what frequency is the self-oscillations during faulty behavior?

## LT3652 solar charger - low charging current and hot IC

I am designing and building device that will work outdoor self-powered using solar panel and battery. Solar panel rated 10W gives Im=0.65A (short-circuit) and has power peak at Um=16.8V (21V open-circuit). The VRLA battery from Yuasa is rated 4Ah 12V (13.65V floating). I followed data sheet and designed circuitry with C/10 loading (no timer) so for

## 2khz frequency noise

The 10.5 kHz line, although lower level doesn't look much better. I know this is a multi-channel design. It would be reasonable to identify where the signal is actually generated. Although some people use "noise" in very broad sense, I won't use the term in the present case. The signal looks more like generated by self-oscillation, but not in t

## How to find self oscillation frequency of frequency divider

I have designed a CML based frequency divider with a division ratio of 50. It divides signal from 2.5GHz to 50 MHz. But I am not sure how to find out the self oscillation frequency of the system. Please let me know ,the method. Also let me know the procedure to simulate the sensitivity characteristics of the divider.

## TSMC 130um inductor with width of 30um

What kind of issues should I consider if I want to use 30um width inductor? Area is not a problem. Through ADS Momentum, the self-oscillation frequency is also not a problem for expected band. The Q factor of 30um width is larger than that of 15um or 9um. What else? Why it seems people like use 15um or 9um rather than 30um?

## RF choke + Inductor Self Resonant Frequency

SRF should be a little higher than the operating frequency. Added after 45 minutes: SRF is defined by the equation: SFR=1/(2*Sqrt(L*C)) For choke applications, the SRF is the frequency that provides the best signal blocking. At frequencies below the SRF, impedance increases with frequency. At the

## Is it possible to design a 1.8 GHz VCO in 0.18 CMOS?

Generally VCO can be constructed with two mechanisms: 1. Using oscillation swing to change frequency, such as Maneatis's self-bais structure. In this case if you use 3.3v power supply, you will have approximate 2.2v (70%) voltage headroom in control voltage for linear VCO gain. Then 1.8GHz/2.2v=818MHz/V. It is realizable in 0.18um (...)