ESR metar sema

ideal capacitor ESR

reactive part X C =

1 2 πf . C 012022 - 11

1.255V 1.244V 0

2k2

+5V

1M

1.255V

2k2

0

0

XC = 0

S Q

Q

D

11mV 0

1M ESR

C

ESR = 10Ω

1M

1.244V 0

+5V 0

2k2 C.u.T. ≈ 100 µF

1M

2k2

R

1.255V 1.244V 0

012022 - 12

50mV 0

2k2

+5V

1M

50mV

0

2k2

0

0

50mVpp

XC = 15

S C

Q ESR

Q

D

0V DC

1M ESR = 0Ω

1M

50mV +5V 0

0

1M

2k2

R

2k2 50mV

C.u.T. ≈ 100nF

0

012022 - 13

16

Elektor Electronics

9/2002

+5V

+5V +9V U BATT

R2 4k7

180p

IC1.C &

&

BT1

&

7

2 100n

13

100µ 16V

9V

VOUT

0

IC2.B

ICL7660

D

C3

LV

10µ 16V

8

5

C–

9

C

12

TEST CAP. SHORT

IC1

C4

S

OSC

10µ 16V 4

10

R 11

S1 C13

IC7

C6

C2

- 5V

C+

C5

1

3

6

1 BOOST

2

+5V

14

8

100n

7

IC1.A

5

4

9

C12

IC2

+9V

IC1.B 8

10

14

+5V

10k

100k

C1

FREQ. ADJUST

P4 5k MT

R1

R23

+5V

IC5 LM2931-5,0

3

10µ 16V

6

100n

7

IC3.D R9

R3

C

4 S C

IC2.A

2

D1

5

1k

IC3.B

1n

4

Cx

D2

SYMMETRY ADJUST

6

D

D4

R16

3

D3

2

1M

1

IC4.A

R15

5

+5V

3

1M

13 R8 1

2x 1N4002

2

IC3.A B

R12

56Ω

2k2

ZERO ADJUST P2 100k

R21

6

47Ω

A

R11

R6

R18

R20

2k2

2x 1N4002 IC1 = 4093 IC2 = 74ACT74 IC3 = 74VHC4066 IC4 = LF412 IC6 = 4070

C15

R26

TPD

1M

R 3

D

2k2

1

1M 12

R7

P3 1k

R22

10

56Ω

10k

+5V

TPC

R10

56Ω

1k8

11

56Ω 8

9

MT R17

+5V

+9V U BATT

10k

IC3.C +5V

+5V - 5V

33k

C11

IC3

5

R31 10k

14

R5

IC8

100n

7

3

IC6.B

LO BATT

8

LM358 2

LCD1

1

8

=1 4 16

12

P3 2

6

P2

P1

1

4

=1

R13

IC6.A 3 39

28

ARR PL

2

100k 1M

R24

B1

B1

C1 C1

D1 D1

E1

4

E1

F1

3

F1

G1

2

A2

B2

C2

D2

E2

8

G1

A2

B2

C2

D2

E2

F2

G2

6

G2

7

F2

C3

D3

B3 B3

C3

D3

E3

G3

F3

25 13 14 9

IC9

REF HI

5k MT

32

40

39

38

R27 C14

100p

34 C16 100n

33

29

28

INT

BUFF

REF LO A/Z

C REF

C REF

COMM

OSC 3

10n 30 IN LO

OSC 2

10k

P1

+5V

5

V

R28 21 1 36

P5

V

35 26

1k

27

R30 C17

220n

100k

220n

7

23 22 17 18 19 20 21

10 11 12

1 40

ICL7106

C8

TPB 22k

C7

IC4.B

27 26 13 14 15 24 25

BP

100k

6

R14

22 17 18 15 24 16 23

37 TEST 31 IN HI

R29 5

20 19

10 11 29 30

OSC 1

10k

7

TPA

R25

POL

R19

AB

IC6

E3

32 31 9

14

- 5V

F3

G3

100n

BP

VARITRONIX VI-302 DPRC

C9

A3

+5V

4

BP

3 BC4

A3

IC4

22k

8

A1

38 100n

A1

22k

R4 C10

10k

+5V

C18

- 5V 100n

012022 - 14

ROTKELE )C(

1-220210

T

012022-1

T

H1

C18 R30

C17 IC8

C6

IC9

C8

D R12

H3

C10

C16

R29

IC4

R22 R16 R26 R15 R20 R21

IC3 D3 D4

TPA

C2

C14

P1

R27

R14 R25 R24 R19

IC7

C4

C11

C7 TPD P2

TPB

+9V BT1 0

C15

LCD1

IC6

P3

R4 R31 R13 R3

C

B

C5

H2

R18 R17

IC2 R6 R23

A

S1

R5

P5

TPC

IC1

R2 R1

R11 R8

C12

P4 C1

IC5

C9

D2 D1 R7 R9 R10

R28 C13

C3

012022-1 (C) ELEKTOR

COMPONENTS LIST Resistors: R1,R13,R14,R17,R18,R19, R31 = 10kΩ R2 = 4kΩ7 R3 = 1kΩ8 R4,R24,R28 = 22kΩ R5 = 33kΩ R6,R7,R8 = 2kΩ2 R9-R12 = 56Ω R15,R16,R20,R22,R29 = 1MΩ R21 = 47Ω R23,R25,R27,R30 = 100kΩ R26 = 1kΩ P1,P4 = 5kΩ multiturn preset, vertical mounting, side adjust (Bourns 3266X, Farnell #347-747) P2 = 100kΩ multiturn preset, vertical mounting, side adjust (Bourns 3266X, Farnell #347-784) P5 = 1kΩ multiturn preset, vertical mounting, side adjust (Bourns 3266X, Farnell #347-723) P3 = 1kΩ preset, horizontal mounting Capacitors: C1 = 180pF C2,C9-C13,C16,C18 = 100nF C3,C4,C5 = 10µF 10V radial C6 = 100µF 16V radial C7 = 220nF C8 = 10nF

C14=100pF C15 = 1nF C17 = 220nF Semiconductors: D1-D4 = 1N4002 IC1 = 4093 IC2 = 74ACT74 PC IC3 = 74VHC4066 IC4 = LF412-CN IC5 = LM2931-5,0 IC6 = 4070 IC7 = ICL7660 IC8 = LM358-N IC9 = ICL7106-CP Miscellaneous: LCD1 = 3.5 Digit LCD with LOBATT indicator, e.g., Varitronix VI302 DPRC (Farnell #478-660) S1 = pushbutton, 1 make contact Battery holder On/off switch 2 miniature probes, e.g., Hirschmann PRUF1 (Farnell #523-483) Length of 2-core screened cable ABS enclosure with LCD window and battery compartment, e.g. Multicomp type BC4, (Farnell # 645-758) 40-pin IC socket cut in half (see text) PCB, order code 012022-1

max. 0.5 m

A

Probe 1

B

C

D

Probe 2