AM-FM-TV RF AMPLIFIER

Noisy-signals-filter

This circuit filters noise, such as glitches and contact bounce, from digital signals. You can easily adjust the circuit for a wide range of noise frequencies. The circuit"s output changes state only if the input differs from the output long enough for the counter to count eight cycles. If...

10Mhz coaxial line driver

The circuit will find excellent usage in high frequency line driving systems that require wide-power bandwidths at high output current levels. (IC=HA2530) The bandwidth of the circuit is limited only by the single pole response of the feedback components;namely f(—3 dB) = Vz p RfCf

100Khz Crystal Calibrator

Using a 12-V supply, this crystal calibrator should prove a useful accessory for a SW receiver. Ql and Q2 form a

Room Monitor Circuit

The circuit uses Ql to buffer the right-channel balance output while Q2 and Q3 form a VOX circuit. When the signal level from the microphone goes high, the output of the VOX also goes high and the multiplexer inside IC1 switches the high-gain left-channel output through to a following buffer stage.

Constant-current-stimulator

Most circuits that provide an electrical stimulus for research subjects are constant-voltage designs; this circuit is a constant-current design. Stimulator circuits must be isolated for two reasons: to ensure safety and to minimize interference. Isolated stimulators are essentially two-terminal...

Power Buffer Boosts Reference Current

A method of boosting the output current of a reference and also protecting against overloads is shown

Mixer preamplifier with tone control

General purpose preamplifier/mixer accepts up to four inputs, has a gain of 1600, and provides bass and treble controls that can be varied ± 10 dB at 100 Hz and 10 kHz respectively

Butler emitter follower oscillator 100Mhz

This circuit has good performance without amplifier has a gain of only one with built-in any parasitics because emitter follower negative feedback