Combined filter/coil driver functions and used a spare opamp to get
the Q3 inversion to feed back to D1.

I used LT1677's 'cause they were in the LTspice database, and handy,
but there are probably other parts out there that would work as well,
for less money.

---
JF

On Tue, 09 Nov 2010 09:41:50 -0600, John Fields
wrote:

Combined filter/coil driver functions and used a spare opamp to get
the Q3 inversion to feed back to D1.

I used LT1677's 'cause they were in the LTspice database, and handy,
but there are probably other parts out there that would work as well,
for less money.

---
JF

John, Why does the lower left corner of your D-Flop symbol show as an
unconnected pin?

...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

Ding Dong! That Wicked Old Witch Pelosi is Dead! Hurrah! Hurrah!

On Tue, 09 Nov 2010 09:12:34 -0700, Jim Thompson
wrote:

On Tue, 09 Nov 2010 09:41:50 -0600, John Fields
wrote:

Combined filter/coil driver functions and used a spare opamp to get
the Q3 inversion to feed back to D1.

I used LT1677's 'cause they were in the LTspice database, and handy,
but there are probably other parts out there that would work as well,
for less money.

---
JF

John, Why does the lower left corner of your D-Flop symbol show as an
unconnected pin?

...Jim Thompson

---
Look in the help under "A. Special functions".

It only mentions it in context with the gates, but it probably applies
to the dflop as well. Helmut will know, for sure.

---
JF

On Tue, 09 Nov 2010 11:02:15 -0600, John Fields
wrote:

On Tue, 09 Nov 2010 09:12:34 -0700, Jim Thompson
wrote:

On Tue, 09 Nov 2010 09:41:50 -0600, John Fields
wrote:

Combined filter/coil driver functions and used a spare opamp to get
the Q3 inversion to feed back to D1.

I used LT1677's 'cause they were in the LTspice database, and handy,
but there are probably other parts out there that would work as well,
for less money.

---
JF

John, Why does the lower left corner of your D-Flop symbol show as an
unconnected pin?

...Jim Thompson

---
Look in the help under "A. Special functions".

It only mentions it in context with the gates, but it probably applies
to the dflop as well. Helmut will know, for sure.

---
JF

Aha! Hidden global nodes. PSpice uses other notation.

...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

Ding Dong! That Wicked Old Witch Pelosi is Dead! Hurrah! Hurrah!