The design I have in mind will be battery operated, so I have found the TL972 (Datasheet Here) which only operates from 0-12V. What I want this Op-Amp to do is to create a sawtooth/triangle wave generator to drive a VCO, namely the POS-535+ (Datasheet here). The frequency we want the VCO to output is around 300-400 MHz, and according to the figure named "Frequency and Tuning Sensitivity" in that datasheet, 2-7'ish volts will cover that output range of frequencies. (For the design, I want 1-8V just to be on the safe side.

. . .

I have researched all over the internet, but the only Op Amps I am seeing that will generate the desired waveforms swing and operate from negative voltages. I have tried those circuits, to no avail. Technically, I could use an LDO voltage regulator to output a negative voltage for an op-amp, but this will add more complexity/cost to the circuit and will be considered as a last resort. So designing this circuit isn't too easy as first we have to make the first portion of the op-amp create a square wave, and then the other will create the ramp. I'm not entirely sure how to do that and would like help/pointers on doing so. Unfortunately, I have no schematics thus far for reference as all the schematics I have seen are for op-amps that operate between negative to positive.

. . .

Also, to generate a ramp wave of 1-8V is pretty dang broad. If there is a better VCO that operates no more than 12V and covers 300-400 MHz, please by all means recommend one to me if that is more convenient than designing a ramp wave that sweeps 1-8V.
Any help, guidance, or pointers is greatly appreciated! (Forgive my terminology if I misused some terms. Engineer in progress here.)

The design I have in mind will be battery operated, so I have found the TL972 (Datasheet Here) which only operates from 0  - 12 V. What I want this op-amp to do is to create a sawtooth/triangle wave generator to drive a VCO, namely the POS-535+ (Datasheet here). The frequency we want the VCO to output is around 300  - 400 MHz, and according to the figure named "Frequency and Tuning Sensitivity" in that datasheet, 2  - 7'ish volts will cover that output range of frequencies. (For the design, I want 1  - 8 V just to be on the safe side.

. . .

I have researched all over the Internet, but the only op-amps I am seeing that will generate the desired waveforms swing and operate from negative voltages. I have tried those circuits, to no avail.

Technically, I could use an LDO voltage regulator to output a negative voltage for an op-amp, but this will add more complexity/cost to the circuit and will be considered as a last resort.

So designing this circuit isn't too easy as first we have to make the first portion of the op-amp create a square wave, and then the other will create the ramp. I'm not entirely sure how to do that and would like help/pointers on doing so. Unfortunately, I have no schematics thus far for reference as all the schematics I have seen are for op-amps that operate between negative to positive.

. . .

Also, to generate a ramp wave of 1  - 8 V is pretty dang broad. If there is a better VCO that operates no more than 12 V and covers 300  - 400 MHz, please by all means recommend one to me if that is more convenient than designing a ramp wave that sweeps 1  - 8V.
Any help, guidance, or pointers is greatly appreciated! (Forgive my terminology if I misused some terms. Engineer in progress here.)