Recent content by bzr2915

1. hspicerf simulation problem for measure vco frequency under different control votage

Hi guys, The following is my measure commands: .HBOSC TONE=2500e6 NHARMS=12 PROBENODE=vin,vip,1 + SWEEP v_control LIN 10 0.1 1.6 .measure hbosc fh find 'hertz' at=0.1 .measure hbosc fl find 'hertz' at=1.6 v_control is the control voltage for my vco. I wanna to measure the frequency at...
2. how to convert vcc vss to a vdd gnd voltage?

Just ignore the rf source we don't care the frequency and other things. I want to know is there any method convert a +/-0.6v power supply to a 1.2v? The front end is not a part of the question.. if I generated a 1.2 v directly by AC then I will lose half of RF input power by the fixed...
3. how to convert vcc vss to a vdd gnd voltage?

Here is what I want. Let me know if you guys still confused. Thank you!
4. MOS Rectifier Test Circuit

Anyway, you should put a ground to your tansponder I think. If not there is no path for your current to flow. And it is not equal to a direct connection from source to your tansponder.
5. how to convert vcc vss to a vdd gnd voltage?

Thanks. This opamp need a high power supply to work in your circuit (10v and -10v). If I use an opamp to get a 1.2v output the top rail power supply is at least 1.2v right? But now I only have a -0.6v(bottom rail), 0.6v(top rail) power supply. I think you still confused my question. OK let me...
6. how to convert vcc vss to a vdd gnd voltage?

Thanks for your rely! Problem is I want VDD to be 1.2v with respect to ground. And now I have a VCC is 0.6v and VSS is -0.6v both of them with respect to ground.
7. how to convert vcc vss to a vdd gnd voltage?

Thanks for your rely! Yes it is a HF applicaition, I convert the AC input to a DC output voltage (vcc and vss). Can you show me how to use an op amp to get the VDD?
8. how to convert vcc vss to a vdd gnd voltage?

Now I have a vcc = 0.6v and vss= -0.6 then how to convert this supply to a vdd = 1.2v ?
9. how does this voltage limiter work?

The voltage limiter schematic is shown as above. How does this circuit work? Seems like vcc=vcc-vds(m5)-vds(m1)? I don't want VCC exceed 1v as well as VSS exceed -1v.
10. About PMOS Diode connection (current direction)

Thanks for your rely! Yes, I know normally cmos bulk should be connected like what you say. However, diode is not avaliable to be integrated in IC design, right?. So I want to find a MOS diode, just function as an ideal diode(two port component) not the load as describe on the textbook. The...
11. About PMOS Diode connection (current direction)

Help! About PMOS Diode connection (current direction) The figure above is a PMOS, when VL is higher than VR, there will be a current from VL to VR. It means that the diode turns on when it is forward-biased. On the other hand, when VR is higher than VL, the voltage of drain is higher than...