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## Filter Constant |

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zero value constant , constant vgs , constant propagation , transformer constant

137 Threads found on edaboard.com: **Filter Constant**

kokikak2,
You may need to design a all pass **filter** for this application. Delay time will be a **constant** but shifted phase will be depand on frequency.
No matter you design a circuit to shift phase of tone. But it's nearly improsible to shift a board band analog signal in a same vaule of phase.
If the boardband signal be modulated by a

Analog Circuit Design :: 05-06-2005 15:32 :: Wenye :: Replies: **2** :: Views: **1162**

I don't quite understand. A FIR **filter** multiplies the incoming data by a bunch of **constant**s, and then sums the products. You say that you can use **constant** multipliers. So where is the problem?

ASIC Design Methodologies and Tools (Digital) :: 04-12-2005 12:50 :: echo47 :: Replies: **2** :: Views: **1344**

Hi
For a **filter** rise time is equal to k/BW, which differ from one **filter** type to onther type.
Regards

Elementary Electronic Questions :: 04-02-2005 15:36 :: Circuit_seller :: Replies: **3** :: Views: **1620**

Most books about **filter**s or about transmission lines written prior to 1960 will have this as one of the chapters. Also, general handbooks on radio in this time period will have information.
If you have any specific questions I can help.

Elementary Electronic Questions :: 03-13-2005 19:12 :: flatulent :: Replies: **9** :: Views: **3804**

anybody can give me how to calculate the phase shifter of a **constant** k **filter**?how to analysis a t network?

Digital Signal Processing :: 03-13-2005 14:31 :: 105s :: Replies: **1** :: Views: **1277**

Hi, I'm designing a BPF in range 3.1-3.8 GHz (700MHz bandwith at -10dB). I'm using ADS's **filter** Design Guide. But it is only allowable to design **filter** with luped components, so I'm using Passive Circuit Design Guide to design microstrip coupled-line **filter**. I want my **filter** be with **constant** group delay, (...)

RF, Microwave, Antennas and Optics :: 03-12-2005 22:10 :: DimaA :: Replies: **2** :: Views: **1304**

Use this formula for a single RC **filter**. This gives you the attenuation at the frequency you want.
T(f) = 1/sqrt(1 + (2*pi*f*tau)^2)
tau is the RC time **constant** is the value you listed, f is the frequency.
Bastos

Analog Circuit Design :: 03-08-2005 10:26 :: bastos4321 :: Replies: **4** :: Views: **3518**

Do you use the PTAT to bias the op amplifier of BandGap?
If so , i think you can add the decouping capacitor to **filter** some high frequency noise to get a relative **constant** current mirror. so this reduces the noise of op amplifier to decrease the effect with the noise.

Analog Circuit Design :: 03-05-2005 02:18 :: jiangwp :: Replies: **6** :: Views: **1528**

The image impedance concept is that the input impedance of the **filter** is equal to thee load impedance when the sections are cascaded. The m-derived aspect is putting a zero in the stop band. This makes the input impedance more **constant** over the pass band. there is also a double m with two zeros but it is rarely used.

RF, Microwave, Antennas and Optics :: 12-23-2004 15:42 :: flatulent :: Replies: **1** :: Views: **1500**

Hi, there
I had a digital fir synthesizer question and I donot know which way should take. Can anyone help.
Thanks in advance.
My question is: I have the amplitude and group delay(not **constant**) constraints of the FIR **filter** and i need to design a **filter** to approximate these spec. What I know now is these constraints are nonlinear (...)

Digital Signal Processing :: 11-16-2004 20:32 :: fxiao :: Replies: **1** :: Views: **1093**

Hi,
The group delay for a signal passing through a **filter** is the among of time needed to all the frequencies of this signal to pass the **filter**. For example if the signal at the input of a **filter** is a pulse and if the group delay is not **constant** for all frenquencies, at the output of the **filter** the signal (...)

Analog Circuit Design :: 11-13-2004 11:31 :: papyaki :: Replies: **3** :: Views: **1269**

Hi,
in addition to the method explained by Flatulent, depending on a type of your **filter**, you might use shapes different from ractangular coupled lines. For example, microstrip disk resonators can have Q factors 4 times (!!) greater than half wavelength line resonator.
flyhigh

RF, Microwave, Antennas and Optics :: 11-11-2004 16:02 :: flyhigh :: Replies: **5** :: Views: **1459**

Group delay is not really relevant, infact it represents the absolute delay that a signal will have when passing through your **filter**.
More important is group delay ripple, because, having an high ripple, the different harmonic components of your modulated signal will be delayed in different way, giving a distortion to the signal itself.
Mazz

Analog Circuit Design :: 08-23-2004 06:42 :: Mazz :: Replies: **6** :: Views: **1231**

Hi to all...
I'm a beginner and I need a simple circuit that convert a signal of 150hz with variable duty cycle (from 0 to 100%) to a **constant** voltage proportional to the duty cycle...
I have tryed to find in internet, and I think that I need a lc **filter** (i am not sure...) , but I not say how calculate the values of the components...
Thanks t

Analog Circuit Design :: 07-24-2004 08:08 :: masterx81 :: Replies: **10** :: Views: **2630**

Ideal transfer function has linear phase characteristis with frequency. Corresponding group delay is **constant**. That means that all frequency component of signal has the same delay at output. Composition of complex signal (Fourier) is not affected by phase characteristic. Complete signal is only delayed and has original shape. Real transfer function

Analog Circuit Design :: 06-23-2004 20:03 :: Borber :: Replies: **12** :: Views: **3997**

Capacitor is intended to **filter** pulsations - it will not affect on **constant** voltage dropping.
To decrease voltage dropping you need to use more powerful transformer and suitable diodes (try to use shotky diodes) in rectifier. Anyway, voltage will be decreasing when current will increase - use voltage stabilizator to avoid it.
If you are talk

Hobby Circuits and Small Projects Problems :: 06-07-2004 07:11 :: klug :: Replies: **2** :: Views: **1720**

Hello sajeev_antony
Maybe book "Digital Signal Processing with Field Programmable Gate Arrays" by Meyer-Baese will help you.
CH3-FIR digital **filter**s
Digital **filter**s
Designing FIR **filter**s
**constant** Coefficien FIR Design
Exercises
CH4 - IIR digital **filter**s
IIR Theory
IIR Coefficient Computation (...)

PLD, SPLD, GAL, CPLD, FPGA Design :: 09-29-2003 20:14 :: mhmhmh :: Replies: **8** :: Views: **4627**

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