| 摘要 |
<p>A temperature control system having an electric heating device selectively energizable by way of a gate controlled semiconductor switch according to indications from a temperature sensing element, The system employs an integrated monolithic semiconductor circuit having a plurality of differential amplifiers therein, each of which receives a temperature indicative signal and a reference signal for either high, low or preferred temperature, and the differential amplifier outputs are used to control the heating element energization as well as to enable or disable high and low temperature indicators. A lockout function is derived from the high temperature indication to prevent the enabling of the heating element when a predetermined maximum temperature has been exceeded.</p> |
