KlausST
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Yesterday, 23:42Hi, It depends on a lot of things. Power supply, power requirements, noise expectations, the chosen Opamp.... Often the datasheet and...67 replies | 1478 view(s) -
Yesterday, 17:24Hi, Yes, with tye suitable combination of Opamp and buffer. But I call it stupid ... to add a buffer instead of using meaningful resistor...67 replies | 1478 view(s)
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18th February 2020, 22:26Hi, In a forum ... you should show what you have done... and how you tested it, what you expected and what you see instead Klaus2 replies | 151 view(s)
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18th February 2020, 03:49KlausST replied to a thread Different current measurmen numbers on a FLUKE 289 in Elementary Electronic QuestionsHi, Last page of the datasheet tells the burden resistances in current measurement mode. It is 102 Ohms vs 1.8 Ohms ... does not explain your...3 replies | 179 view(s)
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18th February 2020, 03:35Hi, This is your mistake. On a dual supply Opamp none of the supply rails is GND.... (with standard node naming) Klaus67 replies | 1478 view(s)
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18th February 2020, 03:27Hi, I'm no HF specialist, but afaik Fspacing depends on the input (data) frequency. Klaus12 replies | 269 view(s)
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18th February 2020, 03:24KlausST replied to a thread Different current measurmen numbers on a FLUKE 289 in Elementary Electronic QuestionsHi, What's the resistor value? Show a photo how you connected it. AC or DC? If AC: is the Voltmeter trueRMS or not? What waveform? 970 ohms...3 replies | 179 view(s)
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18th February 2020, 03:16KlausST replied to a thread [SOLVED] Ultra low-power timer to make a power saving circuit in Analog Circuit DesignHi, As far as I know .. every microcontroller acts this way. Idle state does not mean power off .... Klaus23 replies | 607 view(s)
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18th February 2020, 03:07Hi, No. A dual power supply has three connections (at least). +voltage, GND (or 0V), -voltage. GND is the reference to each of the dual...67 replies | 1478 view(s)
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18th February 2020, 02:58KlausST replied to a thread [SOLVED] Ultra low-power timer to make a power saving circuit in Analog Circuit DesignHi, You don't need a DFF. The MCU will keep it's I/O as you program it ... even in sleep mode. Klaus23 replies | 607 view(s)
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17th February 2020, 18:51KlausST replied to a thread 14 bit adc output to 5 bit data conversion in VHDL in PLD, SPLD, GAL, CPLD, FPGA DesignHi, Maybe I misunderstand.. But if you want to generate 5 (linear. Not logarithmic like u-law, A-law) bits from a 14 bit ADC ... then just use...3 replies | 322 view(s)
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17th February 2020, 06:51KlausST replied to a thread Measure inl of an ADC in cadence in Analog Integrated Circuit (IC) Design, Layout and FabricationHi, This topic is not new, thus do an internet search "INL measurement ADC" to find documents. I see documents from adc manufacturers, but I...4 replies | 233 view(s)
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17th February 2020, 06:43Hi, I see no reason, why the zener can't be external. I don't think EM (HF) is a problem, I rather think it's overvoltage, overcurrent or...3 replies | 226 view(s)
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17th February 2020, 06:37KlausST replied to a thread Phase detector with synchronous logic (FPGA) in RF, Microwave, Antennas and OpticsHi, DFT or correlation comes into my mind. Not that difficult math..but good precision, even for noisy signals. Klaus13 replies | 458 view(s)
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17th February 2020, 00:21KlausST replied to a thread [SOLVED] Ultra low-power timer to make a power saving circuit in Analog Circuit DesignHi, Why do you ask? Page 159 specifies supply voltage range....and it starts at 3V. But if you want lower supply voltage, then just choose...23 replies | 607 view(s)
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16th February 2020, 22:51Hi, A fully agree with FvM. The first results of a simple internet search "simm sdram specification" leads you the big manufacturers... and...4 replies | 302 view(s)
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16th February 2020, 21:23Hi. Why don't you draw the dual supply? ... when you want to discuss about... Klaus67 replies | 1478 view(s)
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16th February 2020, 21:14Hi, If you are the designer, the you should give specifications. Otherwise we could guess a hundred posts.... Klaus4 replies | 302 view(s)
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16th February 2020, 20:01Hi, There is no answer, because there is a lack of information. * what do you define as 0V_node? * where is +IN connected. --> draw a...67 replies | 1478 view(s)
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16th February 2020, 18:30KlausST replied to a thread [SOLVED] Ultra low-power timer to make a power saving circuit in Analog Circuit DesignHi, In post#10 you have chosen Atmega48. --> Thus in post#11 I referred exactly to Atmega48 datasheet. Now you choose another AVR ... and...23 replies | 607 view(s)
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16th February 2020, 12:17KlausST replied to a thread [SOLVED] Ultra low-power timer to make a power saving circuit in Analog Circuit DesignHi, I recommended * 32kHz --> 25uA @ 3V active * most of the time idle --> 15uA @ 3V For sure, if you don't follow my recommendation,...23 replies | 607 view(s)
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16th February 2020, 10:37KlausST replied to a thread [SOLVED] Ultra low-power timer to make a power saving circuit in Analog Circuit DesignHi, Not clear how you come to 12uA... There are low power microcontrollers. Like AVR picopower, maybe other brands draw even less power. When...23 replies | 607 view(s)
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16th February 2020, 03:25Hi, Just to clarify: When you violate absolute maximum ratings, then immediately permanent damage may occur. When you want to look for...67 replies | 1478 view(s)
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16th February 2020, 02:11KlausST replied to a thread [SOLVED] Ultra low-power timer to make a power saving circuit in Analog Circuit DesignHi, 20uA for a CMOS devuce is pretty high. But it's not the typical current, but the maximum current. Nexperia 74LVC163 datasheet says 0.1uA...23 replies | 607 view(s)
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15th February 2020, 22:04KlausST replied to a thread Glow LED on specified counter values 0-500 in 89c52 uC in MicrocontrollersHi, Is the same as if ( (Counter % 15) == 10) LED1 = 1; Klaus30 replies | 1062 view(s)
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15th February 2020, 21:58Hi, A question.... * Do you want to write code on your own? --> then start with an idea, a piece of paper, a pencil, a flow chart.... * Or do...2 replies | 208 view(s)
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15th February 2020, 21:38KlausST replied to a thread [SOLVED] Ultra low-power timer to make a power saving circuit in Analog Circuit DesignHi, Definitions of "Precision" and "duty cycle" can be found in the internet. A "signal" should be defined somehow... (I assume it's a digital...23 replies | 607 view(s)
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15th February 2020, 21:02KlausST replied to a thread Glow LED on specified counter values 0-500 in 89c52 uC in MicrocontrollersHi, (Counter - 10) % 10) is the same as (Counter % 10) (Counter - 15) % 15) is the same as (Counter % 15) Klaus30 replies | 1062 view(s)
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15th February 2020, 18:24KlausST replied to a thread [SOLVED] Ultra low-power timer to make a power saving circuit in Analog Circuit DesignHi, Give specifications, like * expected current consumption ... but please not "as low as possible" * precision, * duty cyle, or how the...23 replies | 607 view(s)
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15th February 2020, 11:14KlausST replied to a thread Basic 12v Battery VOLTAGE METER, more resolution needed in Elementary Electronic QuestionsHi, And this I think exactly is the point "why". If the voltage drop (and power dissipation) is not done externally, then all the (same)...20 replies | 1421 view(s)
About KlausST
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