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45MHz Group Delay Filter Design!
ignoramus wrote:I guess the group delay is needed to allow the nosie blanker time enough to decide on blank no blank switching Yes, that's right! I need a delay about 20% greater...
Thursday, 23 March 2006 - 07:13
Simplest way to measure current ?
Hi! Using 0.47 Ohm resistor in series with the load and with current 2A, gives almost a 1V drop. If It is connected to GND path, then the LOAD'S GND will be with that offset 1V....
Friday, 17 June 2005 - 17:23
Trying to find a smaller function for writing flash page
The examples for subroutines given in datasheets are good and optimized. You may try to write your own as I did, but that didn't save me a lot of flash or execution cycles. Some...
Saturday, 7 May 2005 - 16:32
ATMega128 and AD9954
Mike B wrote:rfdigital wrote: according to the display on the spectrum analyzer something is wrong. I am observing the noise floor of the spectrum analyzer In general, digital...
Friday, 6 May 2005 - 18:05
ATmega16 ADC problem{SOLVED}
Hi! When you start conversion with writing: Quote:SBI ADCSRA,ADSC Then you must wait the same bit "ADSC" to become "0", which is flag that the conversion is complete. Insead of...
Wednesday, 6 April 2005 - 13:47
-5V supply
djdav wrote: It's for an OPAMP used as differential amplifier with +/- input so I need a negative voltage. Hi! It is not necessary to use dual supply to implement differential...
Thursday, 31 March 2005 - 08:58
Power Amplifier online book
Hi! What kind of PA! HF,VHF,UHF or microwave! Go to "Polyfet" website and you will see a lot of AppNotes for 30MHz and above to 200-300MHz as I remember, Power Amplifiers! "...
Thursday, 10 February 2005 - 16:43
AVR not reading pin inputs properly
Hi! When I want to use a pin as an input I first initialize DDRxi='0', and then PORTxi=1 to switch the pull-up. When I read a buttons for example I read PINxi pin 32 times and if...
Monday, 7 February 2005 - 07:38
Am I going crazy?
Hi! It is recommended when you use some port as an input, to switch the internal pull-ups of the port pins, if you don't have any external pull-ups. As I see from the given code...
Monday, 7 February 2005 - 07:19
ddrc & A/D problem
Hi! Here is something that I wrote a month ago for Mega8: Quote: ;***************************************************** init_adc: ldi buf,$47 ; 0 1 0 x | 0 1 1 1 out admux...
Friday, 4 February 2005 - 07:31
Recommend inexpensive PWM buffer opamp?
AD820 (single rail-to-rail), AD823(dual rail-to-rail). These OpAmps are very suitable for active filters and especially for PLL Loop Filter, because of their low offset and bias...
Tuesday, 1 February 2005 - 07:22
Advice on using graphics LCD with external memory bus.
Hi! I could only say that you must compare very carefully the timing diagram for your LCD with that on ATMega128 for a different settings on external RAM bus, and taking care for...
Monday, 24 January 2005 - 07:20

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