Solid State Electronics for an Automatic Self-Balancing Capsule Manometer,
Abstract
Modern solid state electronics for use with Midwood and Hayward automatic manometers are described. Essentially the motor transmitter unit is replaced with CMOS shift registers which generate the waveforms needed to drive the repeater motors and also provide the necessary memory. By powering the shift registers from dry cells when power is off, a memory of about a year is provided since the current drawn is so small. The rest of the circuitry uses an amplifier, phase detector, voltage controlled oscillator and power stage. In addition, a system which eliminates the digitizer and/or replaces the indicator with a digital display is described. This system uses CMOS presettable up-down counters giving a direct BCD output with 'memory', or a binary output if preferred. Circuit details of both stages are included. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1979
- Accession Number
- ADA099737
Entities
People
- E. R. Lording
- J. B. Willis
- L. J. Roberts