(this discussion is continued in Oscillators' basics)
By using a complementary pair, you can use a single control input for the MOSFETs. An Si4501DY MOSFET in this topology exhibits less than a 0.1V drop at 5A for the main element and contains both MOSFETs in an SO-8 package. Figure 1 An n- and p-channel MOSFET pair comprises a break-before-make, single-pole, double-throw switch (a).
In the beginning, there was the original beat. The tightly controlled frequency of a precisely cut quartz crystal that sets the rythm of the rest of the circuit.
- The DMC1028UFDB is a 12V Complementary MOSFET Customized for 3.3V to 1V Synchronous Buck Converters Delivering up to 3A. Synchronous MOSFET (Low -side N -channel).
- A random access nondestructive voltage readout complementary MOSFET memory fabricated on a single integrated circuit 'chip, ' including not only a plurality of identical memory cells arranged in a matrix array, but also the digital address decoding logic circuitry as well as the input/output buffer circuitry including data line driver circuits insulating the memory cell array from.
- Complementary MOSFET symbol in Multisim(Electronics Workbench) Ask Question Asked 6 years, 1 month ago. Active 6 years, 1 month ago. Viewed 1k times 1 $begingroup$ It is just me or symbol for complementary mosfet pair in NI Multisim is wrong? And actually not just the symbol, but the function itself - it doesn't work as it is supposed to(or.
Getting this crystal is easy today, getting it to oscillate properly is a totally different thing. Making it work with a discrete complementary MOSFET driver is yet another story.
Half a century ago, our predecessors would use a pair of NPN to run a watch out of a 8192Hz crystal and a small coin battery:
(source: http://ethw.org/First-Hand:The_First_Quartz_Wrist_Watch)
I haven't seen this topology used since then, people use these circuits instead today:
Complementary Mosfet Circuit
(see http://www.bowdenshobbycircuits.info/page11.htm)
Oh wait, the 2N2904 is a PNP, not NPN type... wth ?
I have already explored discrete Xtal oscillator circuits at https://hackaday.io/project/8121-discrete-yasep/log/26870-clock-generation-circuit but 32KHz is a different and more sensitive domain.
For our purpose, the left circuit (similar to the higher frequency one) is not accepted because it uses an integrated circuit. That would be too easy. On the right, it uses a single bipolar transistor (how 70's !) and the 68K pull-up wastes energy. I want a low-power full CMOS design. Just because.
In theory, the 4069 inverter gate should be easily replaced by a pair of complementary MOSFET. This raises the question of the influence of the combined gate capacitances.
Not shown is the series resistor that K.C. suggested in the comments, I'll have to try it before I commit to the design. For now I'm trying to KISS.
Power Mosfet Circuits
Also missing is a LC filter between the P-MOSFET and VCC.