Add Buffer

CPAR probably denotes parasitic capacitance from the layout, hand-annotated to the schematic for simulation realism. It's implemented by the act of wiring stuff up. M1-M6 look like MOS capacitors, to slow down that inverter's output edges (usually done to add a crude delay, although the purpose of -that- is not clear offhand).

If you add 0.6V to your input, then you get 1V output from the classic NPN emitter follower. It automatically subtracts .6V. Notice the bias sinks as much as 160 uA. If this is not too much for your bias to sink or source, then it may also be all right if the supply goes as low as 1.1 V.

those things add a preamble and synch header before each packet. is this what you are seeing?

Thanks for your reply. I would like to add some more information. I generate a current source of 0.5 mA using an Op Amp which I am feeding to PT1000. The resistance of PT1000 can be calculates as (-548 mV /-0.5 mA = 1097 Ohm) which corresponds to 25 C and this match with reference temperature in the lab. The task is to convert -548 m

how to add op amp buffer to full differential adc mcp3301. wheather i must use dual +- power supply? is lm358 is good .

I would add that you probably want to choose a buffer amp with the smallest S21 magnitude value for frequency pulling reasons.

Q1 and Q2 are emitter-followers that have a low input current but a high output current. Emitter-followers are not inverters. Q1 pulls its emitter high with lots of current to charge C7 then Q2 pulls its emitter low to add the charge on C7 to C8 also adding almost the 24V supply. Therefore I think C8 will charge to almost -44V, not -22V. This high

Not totally clear, but you apparently need to add a buffer on your clock input. You don't give us a lot of information...

Your schematic has nothing to supply the input bias current to the opamp. If it is the signal generator then its resistance will cause the offset voltage. add a same value resistor in series with the (-) input so that the bias currents cancel.

The low input impedance will affect the PLL loop gain, but the minimal phase detector output current of 100 ?A should still give full output swing. Are you sure that the VXCO has the same frequency and control voltage range? You can add a voltage buffer after the loop filter and check if it changes the behavior.

hello , i have designed a 100 Mhz , 5V ring oscillator using ams 0.35 technology. I added pads and during the schematic simulations phase everything works fine. I did the layout and after post layout simulation using the extracted circuit, my circuit wont oscillate . Does anyone have any idea how to validate lvs and post layout simulation with

i give 3 Voltage input there, 1. 12V 2. -15V , using IC 7915 3. 5V.. but the output Voltage is 2-4V.. Where are your checkpoints voltage ? add them on the schematic ... "diviser pour mieux regner !" 1) test first without the buffer AOP .. see schematic test of datasheet ..only one resistor on o

Most microcontroller will sink 10 MA of current, but I like to add a simple NPN transistor buffer.

If you have a 5V supply nearby, you can add some of that to your signal, via resistive The incoming signal is attenuated slightly.

adding buffer in aTiming violated path will further add propogation delay.You can look at Timing Report of the violated path to identify most contributing delays of gates/ nets.Optimize by up/down sizing the gates and also try rerouting nets.

hello, i think you will not find out, direct IC to drive 3 amps at output. did you allready see Microchip MCP23017 .. drive up to 2x8 = 16 outputs dialogue in I2C. after you need to add 1 MOSFET driver as IRLZ14 (gate input at TTL level) for each output to be able to drive 3 the desired voltage (12,24..or more Volts) Maybe sp

Hi, Ifi remember right, then the AT mode is only acessed from the uart side (ucontroller), and not from the radio side. additionally i think there must be some function to enable the AT mode, How else could you send the string "AT*" via bluetooth. Klaus

hi i need to use an ideal voltage buffer in hspice, how can do it? is there any default model of voltage buffer in hspice? if not,how can i add a model by myself? please give me answer or reference, thanks very much - - - Updated - - - of cource it should be noted that i want to buffer a [COLOR="#FF000

You must have read in sdf file. If you do add repeater after reading SDF and not SPEF it will now not be able to compute new the new delay values because it does not have a table. Hence, you see it unconstrained. Please correct me if you are not using SDFs. Thanks, ro9ty

recently, i am doing something about ti s/h i found that parasitic ind became a big problem pkg, pcb, even smd res & cap all of them cause ind so different s/h 's kickback became important most paper solve this problem by add buffer before ti s/h to isolate kickback from input but i think add internal comman resistor maybe another (...)