IES950411A2 - Signal amplitude control circuit - Google Patents

Signal amplitude control circuit

Info

Publication number
IES950411A2
IES950411A2 IES950411A IES950411A2 IE S950411 A2 IES950411 A2 IE S950411A2 IE S950411 A IES950411 A IE S950411A IE S950411 A2 IES950411 A2 IE S950411A2
Authority
IE
Ireland
Prior art keywords
amplifier
signal
appliance
resistor
amplitude
Prior art date
Application number
Inventor
Mark Leyden
Original Assignee
Bmr Res & Dev Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bmr Res & Dev Ltd filed Critical Bmr Res & Dev Ltd
Priority to IES950411 priority Critical patent/IES950411A2/en
Priority to IE950562A priority patent/IE78006B1/en
Publication of IES65482B2 publication Critical patent/IES65482B2/en
Publication of IES950411A2 publication Critical patent/IES950411A2/en

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  • Amplifiers (AREA)
  • Adjustable Resistors (AREA)

Abstract

An electrical or electronic appliance 10 has an amplifier 14 which provides a signal whose amplitude determines the level of an output from the appliance, for example, the volume of a radio or the voltage or current applied to patient electrodes of a medical appliance. The amplitude of the signal from the amplifier 14 is determined by the setting of one of a pair of ganged sliding contacts 13 on a respective resistor Rv2 of a slide tandem potentiometer 12, the other sliding contact 13 engaging the other resistor Rv1. To ensure that the amplifier signal amplitude is not set too high when the appliance is switched on, the setting of the other sliding contact 13 on the resistor Rv1 is monitored by a microprocessor uP via a transistor Q1, and if the amplifier signal exceeds a predetermined threshold the microprocessor holds the amplifier 14 disabled until the potentiometer is re-set to bring the signal amplitude below the threshold.
IES950411 1995-06-06 1995-06-06 Signal amplitude control circuit IES950411A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
IES950411 IES950411A2 (en) 1995-06-06 1995-06-06 Signal amplitude control circuit
IE950562A IE78006B1 (en) 1995-06-06 1995-07-21 Signal amplitude control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IES950411 IES950411A2 (en) 1995-06-06 1995-06-06 Signal amplitude control circuit

Publications (2)

Publication Number Publication Date
IES65482B2 IES65482B2 (en) 1995-11-01
IES950411A2 true IES950411A2 (en) 1995-11-01

Family

ID=11040780

Family Applications (1)

Application Number Title Priority Date Filing Date
IES950411 IES950411A2 (en) 1995-06-06 1995-06-06 Signal amplitude control circuit

Country Status (1)

Country Link
IE (1) IES950411A2 (en)

Also Published As

Publication number Publication date
IES65482B2 (en) 1995-11-01

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Legal Events

Date Code Title Description
FD4E Short term patents deemed void under section 64