PowerSupplySection

470Ω

.001

4

Sine+

−

7

21

3

--12 +12

741

10uF

--12

+12

--12 Trianagle

500Ω

Symmetry

150kFrequency

V co I n

82 k+ 5

22 k

15 k .001

x10 k

Square

4

2

7

14

11

12

13

10

9

8

ICL8038

5

6

1

3

V +

.D.C.

NCNC

NC

.F req

FM Bias FM Sweep

C t

V -

Sin Adj

∿

.01

0.1uF

x100

x1

VCOFunctionGeneratorSection

Square

+5

4

2

7

14

11

12

13

10

9

8

5

6

1

3

7440Vcc

Gnd

.01

nc

A+5

L1

+5Vcc

4

2

7

14

11

12

13

10

9

8

5

6

1

3

7400

Gnd

.01

.01

Vcc

4

2

7

14

11

12

13

10

9

8

5

6

1

3

7402

Gnd

150Ω

L0

A B B

nc

L1

L0

L3L2

150Ω

L2

L3

Logic Section

1k+5S0S1S2S3 Substitutions

7420 replaces 744074LSxx replaces 74xxMC1468 replaces LM4501 with somemodifications.

120VAC

1000µf25Vdc

7805D-Pak

1

2

3

1µf

+5V1A

Grn

Grn

Grn/Yel

500µf 50Vdc

500µf 50Vdc

Red

Red

Red/Yel

100Ω

100Ω

2N4037

2N3053

LM4501NSG4501j

5

4

6

8 14

12

11

13

10

97

.01

.01

270Ω

27k

1

2

.01

.01

NC

NC

NC

NC

3

270Ω

V-Adj

Gnd

+Sense

+Out

+Stab

+In

--In

--Out

--Sense

--Stab

10µ

+12/15V100mA

--12/15V100mA

10µ

Com

15

12--22.7VDC

35VAC CT

19VAC CT

12VDC

22.7VDC

Drawn by Robert Phillips, Westlake, Ohio

CREI ELECTRONICS DESIGN LABORATORY

April 2012