Amplifiers

1. Amplifier-shaper for the frequency counter.

2. Amplifier-shaper for the frequency counter.

3. Preamplifier for the frequency counter.

4. Amplifier-shaper for the frequency counter.

5. Amplifier-shaper for the frequency counter.

Gates based amplifier

6. RF amplifier.

HF amplifier

7. Amplifier.

8. High-Input impedance mplifier with bipolar transistors.

High impedance amplifier based on bipolar transistors

9. Amplifier.

Amplifier circuit

10. IF amplifier.

Amplifier for IF (Intermediate frequency) circuit

11. RF amplifier.

RF Amplifier circuit

12. Amplifier based on logic gates (CD4000).

Gates based amplifier

13. Logarithmic / antilogarithmic amplifier.

Logarithm / Antilogarithm amplifier circuit

14. Gain adjastment.

Volume adjustment

15. Radar detector.

16. Resonant amplifier based on piezo filter.

17. Amplifier with Q multiplier.

18. Simple sound amplifier circuit.

19. Microphone amplifier with differential input.

20. Universal Gray's amplifier.

21. Q multiplier circuit.

22. Amplifier with bandwidth adjustment.

23. Amplifier for PC sound card with galvanic isolation.

24. AC amplifier with diode-capacitance coupling for low frequency.
(Not polarity capacitors sensitive - it can use polar capacitors in AC.)

25. Compensation for distortion in amplifier with diode.

Compensation for distortion with diode

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