Deflection and power supply circuit with reduced start-up drive

Patent · Tue Aug 04 04:00:00 EDT 1981

OSTI ID:6143555

Luz, D W; Willis, D H

In a remote controlled television receiver, the regulator circuit of the main television receiver power supply is made responsive to a remote on/off command signal. A deflection flyback transformer provides operating voltages to the ultor supply and other auxiliary supplies which power such load circuits as audio and vertical deflection. A horizontal output transistor is coupled to a b+ operating voltage terminal of the main power supply through a flyback transformer primary winding. After initiation of the onstate of the command signal, the regulator ciruit rapidly develops a b+ operating voltage. The initially uncharged filter capacitors of the auxiliary supplies act as a low impedance shunt across the flyback transformer primary winding during the startup interval. To limit the horizontal output transistor collector current and power dissipated during start-up, the horizontal driver stage holds the forward base current supplied to the horizontal output transistor each deflection cycle during startup below the steady-state value.

• Assignee: RCA Corp
• Patent Number(s): US 4282460
• OSTI ID: 6143555
• Country of Publication: United States
• Language: English

Related Subjects

440300* -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
CONTROL
DESIGN
ELECTRIC IMPEDANCE
ELECTRICAL EQUIPMENT
ELECTRONIC EQUIPMENT
EQUIPMENT
IMPEDANCE
POWER SUPPLIES
RADIO EQUIPMENT
RADIO EQUIPMENT POWER SUPPLIES
REMOTE CONTROL
TELEVISION
TRANSFORMERS